law ofeffectThorndike's principle thatbehaviors followed byfavorable consequencesbecome more likely, andthat behaviors followed byunfavorable consequencesbecome less likely. (MyersPsychology for AP 3e p.283)AlbertBanduraresearcher famousfor work inobservational orsocial learningincluding thefamous Bobo dollexperimentthresholdthe level ofstimulationrequired totrigger a neuralimpulse.EdwardThorndikePioneer in operantconditioning whodiscovered conceptsin instrumentallearning such as thelaw of effect. Knownfor his work with catsin puzzle boxes.peripheralnervoussystem(PNS)the sensory andmotor neurons thatconnect thecentral nervoussystem (CNS) tothe rest of thebody.partial(intermittent)reinforcementschedulereinforcing a response onlypart of the time; results inslower acquisition of aresponse but much greaterresistance to extinctionthan does continuousreinforcement. (MyersPsychology for AP 3e p.287)binocularcuea depth cue,such as retinaldisparity, thatdepends on theuse of two eyes.middleearthe chamber between theeardrum and cochleacontaining three tiny bones(hammer, anvil, and stirrup)that concentrate thevibrations of the eardrumon the cochlea's ovalwindow.dualprocessingthe principle thatinformation is oftensimultaneouslyprocessed onseparate consciousand unconscioustracksautonomicnervoussystem(ANS)the part of the peripheralnervous system thatcontrols the glands and themuscles of the internalorgans (such as the heart).Its sympathetic divisionarouses; itsparasympathetic divisioncalms.endorphins"morphinewithin"—natural,opiate-likeneurotransmitterslinked to paincontrol and topleasure.secondary(conditioned)reinforcera stimulus thatgains itsreinforcing powerthrough itsassociation with aprimary reinforcerblindspotthe point at whichthe optic nerveleaves the eye,creating a "blind"spot because noreceptor cells arelocated there.thalamusthe brain's sensory controlcenter, located on top ofthe brainstem; it directsmessages to the sensoryreceiving areas in thecortex and transmits repliesto the cerebellum andmedullagestaltan organized whole.Gestalt psychologistsemphasized ourtendency to integratepieces of informationinto meaningfulwholes.transductionconversion of one formof energy into another.In sensation, thetransforming ofstimulus energies,such as sights,sounds, and smells,into neural impulsesour brain can interpret.pituitaryglandthe endocrine system'smost influential gland.Under the influence ofthe hypothalamus, thepituitary regulatesgrowth and controlsother endocrineglands.behaviorgeneticsthe study of therelative power andlimits of geneticand environmentalinfluences onbehavior.synapsethe junction betweenthe axon tip of thesending neuron andthe dendrite or cellbody of the receivingneuron. The tiny gap atthis junction is calledthe synaptic gap orsynaptic cleft.figure-groundthe organization ofthe visual field intoobjects (the figures)that stand out fromtheir surroundings(the ground).subliminalbelow one'sabsolutethreshold forconsciousawarenessgate-controltheorythe theory that the spinalcord contains aneurological "gate" thatblocks pain signals orallows them to pass on tothe brain. The "gate" isopened by the activity ofpain signals traveling upsmall nerve fibers and isclosed by activity in largfixed-intervalschedulein operant conditioning,a reinforcementschedule thatreinforces a responseonly after a specifiedtime has elapsed.(Myers Psychology forAP 3e p. 288)innerearthe innermost partof the ear,containing thecochlea,semicircularcanals, andvestibular sacs.RogerSperrylike Gazzaniga,studied split brainpatients; showedthat left/righthemispheres havedifferent functionsendocrinesystemthe body's "slow"chemicalcommunicationsystem; a set ofglands that secretehormones into thebloodstream.electroencephalogram(EEG)an amplified recordingof the waves ofelectrical activitysweeping across thebrain's surface. Thesewaves are measuredby electrodes placedon the scalp.hypothalamusa neural structure lyingbelow (hypo) the thalamus;it directs severalmaintenance activities(eating, drinking, bodytemperature), helps governthe endocrine system viathe pituitary gland, and islinked to emotion andreward.opponent-processtheorythe theory that opposingretinal processes (red-green, blue-yellow, white-black) enable color vision.For example, some cellsare stimulated by greenand inhibited by red; othersare stimulated by red andinhibited by green.fMRI(functionalMRI)a technique forrevealing bloodflowand, therefore, brainactivity by comparingsuccessive MRI scans.fMRI scans show brainfunction as well as itsstructure.cognitivelearningthe acquisition ofmental information,whether by observingevents, by watchingothers, or throughlanguage. (MyersPsychology for AP 3ep. 272)neurona nerve cell;the basicbuilding blockof the nervoussystem.top-downprocessinginformationprocessing guided byhigher-level mentalprocesses, as whenwe constructperceptions drawingon our experienceand expectations.positivereinforcementincreasing behaviors bypresenting positivereinforcers. A positivereinforcer is any stimulusthat, when presented aftera response, strengthensthe response. (MyersPsychology for AP 3e p.285)temporallobesportion of thecerebral cortex lyingroughly above theears; includes theauditory areas, eachreceiving informationprimarily from theopposite ear.acquisitionin classical conditioning theinitial stage, when one linksa neutral stimulus and anunconditioned stimulus sothat the neutral stimulusbegins triggering theconditioned response. Inoperant conditioning, thestrengthening of areinforced responegativereinforcementincreasing behaviors bystopping or reducingaversive stimuli. A negativereinforcer is any stimulusthat, when removed after aresponse, strengthens theresponse. (Note: Negativereinforcement is notpunishment.) (MyersPsychology for AP 3e p. frequencytheoryin hearing, the theorythat the rate of nerveimpulses traveling upthe auditory nervematches the frequencyof a tone, thusenabling us to senseits pitch. (Also calledtemporal theory.)generalizationthe tendency, once aresponse has beenconditioned, for stimulisimilar to the conditionedstimulus to elicit similarresponses. (In operantconditioning, generalizationoccurs when responseslearned in one situationoccur in other, similarsitucerebellumthe "little brain" at therear of the brainstem;functions includeprocessing sensoryinput, coordinatingmovement output andbalance, and enablingnonverbal learning andmemory.reinforcementin operantconditioning, anyevent thatstrengthens thebehavior it follows.(Myers Psychologyfor AP 3e p. 284)parietallobesportion of thecerebral cortex lyingat the top of the headand toward the rear;receives sensoryinput for touch andbody position.EdwardTolmancognitivepsychologist;latent learningand cognitivemapinterneuronsneurons within thebrain and spinal cordthat communicateinternally andintervene betweenthe sensory inputsand motor outputs.unconditionedresponse(UR)in classical conditioning, anunlearned, naturallyoccurring response (suchas salivation) to anunconditioned stimulus(US) (such as food in themouth). (Myers Psychologyfor AP 3e p. 274)perceptionthe process oforganizing andinterpreting sensoryinformation, enablingus to recognizemeaningful objectsand events.actionpotentiala neuralimpulse; a briefelectricalcharge thattravels down anaxon.antagonista molecule that,by binding to areceptor site,inhibits or blocksa response.differencethresholdthe minimum differencebetween two stimulirequired for detection50 percent of the time.We experience thedifference threshold asa just noticeabledifference (or jnd).splitbraina condition resultingfrom surgery thatisolates the brain'stwo hemispheres bycutting the fibers(mainly those of thecorpus callosum)connecting them.inattentionalblindnessfailing to seevisible objectswhen ourattention isdirectedelsewheremotorcortexan area at therear of thefrontal lobesthat controlsvoluntarymovements.CT(computedtomography)scan a series of X-rayphotographs takenfrom different anglesand combined bycomputer into acompositerepresentation of aslice of the brain'sstructure.monocularcuea depth cue, suchas interposition orlinear perspective,available to eithereye alone.discrimination(1) in classical conditioning,the learned ability todistinguish between aconditioned stimulus andsimilar stimuli that do notsignal an unconditionedstimulus. (In operantconditioning, the ability todistinguish responses thatare reinforcedoperantconditioninga type of learning inwhich a behaviorbecomes more likely torecur if followed by areinforcer or less likelyto recur if followed by apunisher. (MyersPsychology for AP 3ep. 283)sensoryadaptationdiminishedsensitivity as aconsequence ofconstantstimulation.myelinsheatha fatty tissue layersegmentally encasingthe axons of someneurons; enablesvastly greatertransmission speed asneural impulses hopfrom one node to thenext.retinaldisparitya binocular cue forperceiving depth. Bycomparing retinal imagesfrom the two eyes, thebrain computes distance—the greater the disparity(difference) between thetwo images, the closer theobjectadrenalglandsa pair of endocrineglands that sit justabove the kidneys andsecrete hormones(epinephrine andnorepinephrine) thathelp arouse the bodyin times of stress.associationareasareas of the cerebral cortexthat are not involved inprimary motor or sensoryfunctions; rather, they areinvolved in higher mentalfunctions such as learning,remembering, thinking, andspeaking.reflexa simple,automaticresponse to asensory stimulus,such as the knee-jerk response.neutralstimulus(NS)in classicalconditioning, astimulus that elicitsno response beforeconditioning. (MyersPsychology for AP 3ep. 273)CarlWernickean area of the brain (inthe left temporal lobe)involved in languagecomprehension andexpression was namedfor him because hediscovered itperceptualconstancyperceiving objects asunchanging (havingconsistent color,brightness, shape,and size) even asillumination andretinal imageschange.conditionedresponse(CR)in classicalconditioning, alearned response toa previously neutral(but now conditioned)stimulus (CS). (MyersPsychology for AP 3ep. 274)unconditionedstimulus (US)in classical conditioning, astimulus thatunconditionally—naturallyand automatically—triggersan unconditioned responseUR). (Myers Psychology forAP 3e p. 274)modelingthe process ofobserving andimitating a specificbehavior. (MyersPsychology for AP3e p. 312)Weber'slawthe principle that, tobe perceived asdifferent, two stimulimust differ by aconstant minimumpercentage (ratherthan a constantamount).cerebralcortexthe intricate fabric ofinterconnected neuralcells covering thecerebral hemispheres;the body's ultimatecontrol andinformation-processingcenter.intensitythe amount of energyin a light wave orsound wave, whichinfluences what weperceive as brightnessor loudness. Intensityis determined by thewave's amplitude(height).depthperceptionthe ability to seeobjects in threedimensions althoughthe images that strikethe retina are two-dimensional; allowsus to judge distance.PET(positronemissiontomography)scan a visual displayof brain activity thatdetects where aradioactive form ofglucose goes whilethe brain performs agiven task.foveathe central focalpoint in theretina, aroundwhich the eye'scones cluster.primaryreinforceran innatelyreinforcing stimulus,such as one thatsatisfies a biologicalneed. (MyersPsychology for AP 3ep. 286)centralnervoussystem(CNS)the brainand spinalcord.bottom-upprocessinganalysis that beginswith the sensoryreceptors and worksup to the brain'sintegration of sensoryinformation.refractoryperioda period ofinactivityafter aneuron hasfired.spontaneousrecoverythe reappearance,after a pause, of anextinguishedconditionedresponse. (MyersPsychology for AP 3ep. 276)punishmentan event thattends to decreasethe behavior that itfollows. (MyersPsychology for AP3e p. 289)kinesthesiaour movement sense—our system forsensing the positionand movement ofindividual body arts.placetheoryin hearing, the theorythat links the pitch wehear with the placewhere the cochlea'smembrane isstimulated.axonthe neuron extensionthat passesmessages through itsbranches to otherneurons or tomuscles or glands.pupilthe adjustableopening in thecenter of theeye throughwhich lightenters.motionparallaxmonocular depthcues in whichobjects closer to usseem to move at afaster pace thanthose that arefarther away,IvanPavlovRussian physiologist;discovered classicalconditioning; traineddogs to salivate atthe ringing of a bellconsciousnessourawarenessof ourselvesand ourenvironment.signaldetectiontheorya theory predicting howand when we detect thepresence of a faint stimulus(signal) amid backgroundstimulation (noise).Assumes there is no singleabsolute threshold and thatdetection depends partlyon a person's experience,expectations, motiparasympatheticnervous systemthe division of theautonomicnervous systemthat calms thebody, conservingits energyopticnervethe nerve thatcarries neuralimpulsesfrom the eyeto the brain.frequencythe number ofcompletewavelengths thatpass a point in agiven time (forexample, persecond).wavelengththe distance from the peakof one light or sound waveto the peak of the next.Electromagneticwavelengths vary from theshort blips of gamma raysto the long pulses of radiotransmission. (MyersPsychology for AP 3e p.177)olfactionthesense ofsmell.perceptualseta mentalpredispositionto perceiveone thing andnot another.sensoryreceptorssensorynerveendings thatrespond tostimuli.amygdalatwo lima-bean-sized neuralclusters in thelimbic system;linked toemotion.retinathe light-sensitiveinner surface of theeye, containing thereceptor rods andcones plus layers ofneurons that beginthe processing ofvisual information.dendritesa neuron's bushy,branching extensionsthat receivemessages andconduct impulsestoward the cell body.latentlearninglearning that occursbut is not apparentuntil there is anincentive todemonstrate it.(Myers Psychologyfor AP 3e p. 304)conductionhearinglossa less common formof hearing loss,caused by damage tothe mechanicalsystem that conductssound waves to thecochlea.pitcha tone'sexperiencedhighness orlowness;depends onfrequency.fixed-ratioschedulein operant conditioning,a reinforcementschedule thatreinforces a responseonly after a specifiednumber of responses.(Myers Psychology forAP 3e p. 288)rodsretinal receptors thatdetect black, white,and gray, and aresensitive to movement;necessary forperipheral and twilightvision, when conesdon't respond.observationallearninglearning byobserving others.(Also called sociallearning.) (MyersPsychology for AP3e p. 312)corneathe eye's clear,protective outerlayer, coveringthe pupil andiris.frontallobesportion of thecerebral cortex lyingjust behind theforehead; involved inspeaking and musclemovements and inmaking plans andjudgments.sympatheticnervoussystemthe division of theautonomic nervoussystem that arousesthe body, mobilizingits energy in stressfulsituations.reticularformationa nerve network thattravels through thebrainstem andthalamus and playsan important role incontrolling arousal.medullathe base of thebrainstem;controls heart-beat andbreathing.Young-Helmholtztrichromatic(three-color)theorythe theory that the retinacontains three differenttypes of color receptors—one most sensitive to red,one to green, one to blue—which, when stimulated incombination, can producethe perception of any colornervesbundled axons thatform neural "cables"connecting thecentral nervoussystem with muscles,glands, and senseorgans.shapingan operantconditioning procedurein which reinforcersguide behavior towardcloser and closerapproximations of thedesired behavior.(Myers Psychology forAP 3e p. 284)huethe dimension ofcolor that isdetermined by thewavelength of light;what we know as thecolor names blue,green, and so forth.heritabilitythe proportion ofvariation amongindividuals that we canattribute to genes. Theheritability of a traitmay vary, dependingon the range ofpopulations andenvironments studied.PaulBrocadiscovered area inthe brain (namedfor him) in the leftfrontal loberesponsible forlanguageproductionB.F.SkinnerBehaviorist thatdeveloped thetheory of operantconditioning bytraining pigeonsand ratscontinuousreinforcementschedulereinforcing thedesired responseevery time itoccurs. (MyersPsychology for AP3e p. 287)phiphenomenonan illusion ofmovement createdwhen two or moreadjacent lights blinkon and off in quicksuccessionchangeblindnessfailing to noticechanges in theenvironment; aform ofinattentionalblindness.mirrorneuronsfrontal lobe neurons thatsome scientists believe firewhen we perform certainactions or observe anotherdoing so. The brain'smirroring of another'saction may enable imitationand empathy. (MyersPsychology for AP 3e p.313)classicalconditioninga type of learning in whichwe link two or more stimuli;as a result, to illustrate withPavlov's classicexperiment, the firststimulus (a tone) comes toelicit behavior (drooling) inanticipation of the secondstimulus (food). (MyersPsychologycochleaa coiled, bony, fluid-filled tube in the innerear; sound wavestraveling through thecochlear fluid triggernerve impulses.brainstemthe oldest part andcentral core of thebrain, beginning wherethe spinal cord swellsas it enters the skull;the brainstem isresponsible forautomatic survivalfunctionsparrallelprocessingthe processingof manyaspects of aproblemsimultaneouslyneurotransmitterschemical messengers thatcross the synaptic gapsbetween neurons. Whenreleased by the sendingneuron, neurotransmitterstravel across the synapseand bind to receptor siteson the receiving neuron,thereby influencing whetherthat neuron will gecolorconstancyperceiving familiarobjects as havingconsistent color, evenif changingillumination alters thewavelengthsreflected by theobject.motor(efferent)neuronsneurons that carryoutgoinginformation fromthe brain andspinal cord to themuscles andglands.learnedhelplessnessthe hopelessness andpassive resignation ananimal or personlearns when unable toavoid repeatedaversive events.(Myers Psychology forAP 3e p. 307)sensory(afferent)neuronsneurons that carryincominginformation fromthe sensoryreceptors to thebrain and spinalcordprimingthe activation, oftenunconsciously, ofcertain associations,thus predisposingone's perception,memory, orresponse.glialcells(glia)cells in the nervoussystem that support,nourish, and protectneurons; they mayalso play a role inlearning and thinking.variable-intervalschedulein operant conditioning,a reinforcementschedule thatreinforces a responseat unpredictable timeintervals. (MyersPsychology for AP 3ep. 288)limbicsystemneural system(including thehippocampus,amygdala, andhypothalamus) locatedbelow the cerebralhemispheres;associated withemotions and drives.irisa ring of muscletissue that forms thecolored portion of theeye around the pupiland controls the sizeof the pupil opening.selectiveattentionthe focusingof consciousawareness ona particularstimuluscognitivemapa mental representation ofthe layout of one'senvironment. For example,after exploring a maze, ratsact as if they have learneda cognitive map of it.(Myers Psychology for AP3e p. 304)featuredetectorsnerve cells in thebrain's visual cortexthat respond tospecific features ofthe stimulus, such asshape, angle, ormovement.auditionthe senseor act ofhearing.sensationthe process by whichour sensoryreceptors andnervous systemreceive andrepresent stimulusenergies from ourenvironment.somatosensorycortexarea at the front ofthe parietal lobes thatregisters andprocesses bodytouch and movementsensations.agonista molecule that,by binding to areceptor site,stimulates aresponselesiontissue destruction. Abrain lesion is anaturally orexperimentallycaused destruction ofbrain tissue.MichaelGazzanigasplit-brain research;understanding offunctionallateralization in thebrain; how thecerebral hemispherescommunicatesensorineuralhearing losshearing loss caused bydamage to thecochlea's receptor cellsor to the auditorynerves; the mostcommon form ofhearing loss, alsocalled nerve deafness.conesretinal receptors thatare concentrated nearthe center of the retinaand that function indaylight or in well-litconditions. Conesdetect fine detail andgive rise to colorsensations.corpuscallosumthe large band ofneural fibersconnecting the twobrain hemispheresand carryingmessages betweenthem.variable-ratioschedulein operant conditioning,a reinforcementschedule thatreinforces a responseafter an unpredictablenumber of responses.(Myers Psychology forAP 3e p. 288)extinctionthe diminishing of aconditioned response; occursin classical conditioning whenan unconditioned stimulus(US) does not follow aconditioned stimulus (CS);occurs in operant conditioningwhen a response is no longerreinforced. (Myers Psychologysomaticnervoussystemthe division of theperipheral nervoussystem that controlsthe body's skeletalmuscles. (Also calledthe skeletal nervoussystem.)all-or-noneresponsea neuron'sreaction of eitherfiring (with a full-strength response)or not firing.vestibularsenseour sense of bodymovement andposition thatenables our senseof balance.neurogenesistheformationof newneurons.plasticitythe brain's ability tochange, especiallyduring childhood, byreorganizing afterdamage or bybuilding newpathways based onexperience.higher-orderconditioninga procedure in which theconditioned stimulus in oneconditioning experience ispaired with a new neutralstimulus, creating a second(often weaker) conditionedstimulus. For example, ananimal that has learnedthat a tone predicts foodmight theMRI(magneticresonanceimaging)a technique that usesmagnetic fields andradio waves toproduce computer -generated images ofsoft tissue. MRIscans show brainanatomy.insighta sudden realizationof a problem'ssolution; contrastswith strategy-basedsolutions. (MyersPsychology for AP 3epp. 304, 370)reuptakeaneurotransmitter'sreabsorption bythe sendingneuron.JohnB.Watsonbehaviorism; emphasison external behaviorsof people and theirreactions on a givensituation; famous forLittle Albert study inwhich baby was taughtto fear a white ratnervoussystemthe body's speedy,electrochemicalcommunicationnetwork, consisting ofall the nerve cells ofthe peripheral andcentral nervoussystems.habituationdecreasingresponsiveness withrepeated exposure toa stimulus. (MyersPsychology for AP 3epp. 271, 491)hormoneschemicalmessengers that aremanufactured by theendocrine glands,travel through thebloodstream, andaffect other tissues.conditionedstimulus(CS)in classical conditioning, anoriginally neutral stimulusthat, after association withan unconditioned stimulus(US), comes to trigger aconditioned response (CR).(Myers Psychology for AP3e p. 274)lensthe transparentstructure behindthe pupil thatchanges shape tohelp focus imageson the retina.occipitallobesportion of thecerebral cortex lyingat the back of thehead; includes areasthat receiveinformation from thevisual fields.law ofeffectThorndike's principle thatbehaviors followed byfavorable consequencesbecome more likely, andthat behaviors followed byunfavorable consequencesbecome less likely. (MyersPsychology for AP 3e p.283)AlbertBanduraresearcher famousfor work inobservational orsocial learningincluding thefamous Bobo dollexperimentthresholdthe level ofstimulationrequired totrigger a neuralimpulse.EdwardThorndikePioneer in operantconditioning whodiscovered conceptsin instrumentallearning such as thelaw of effect. Knownfor his work with catsin puzzle boxes.peripheralnervoussystem(PNS)the sensory andmotor neurons thatconnect thecentral nervoussystem (CNS) tothe rest of thebody.partial(intermittent)reinforcementschedulereinforcing a response onlypart of the time; results inslower acquisition of aresponse but much greaterresistance to extinctionthan does continuousreinforcement. (MyersPsychology for AP 3e p.287)binocularcuea depth cue,such as retinaldisparity, thatdepends on theuse of two eyes.middleearthe chamber between theeardrum and cochleacontaining three tiny bones(hammer, anvil, and stirrup)that concentrate thevibrations of the eardrumon the cochlea's ovalwindow.dualprocessingthe principle thatinformation is oftensimultaneouslyprocessed onseparate consciousand unconscioustracksautonomicnervoussystem(ANS)the part of the peripheralnervous system thatcontrols the glands and themuscles of the internalorgans (such as the heart).Its sympathetic divisionarouses; itsparasympathetic divisioncalms.endorphins"morphinewithin"—natural,opiate-likeneurotransmitterslinked to paincontrol and topleasure.secondary(conditioned)reinforcera stimulus thatgains itsreinforcing powerthrough itsassociation with aprimary reinforcerblindspotthe point at whichthe optic nerveleaves the eye,creating a "blind"spot because noreceptor cells arelocated there.thalamusthe brain's sensory controlcenter, located on top ofthe brainstem; it directsmessages to the sensoryreceiving areas in thecortex and transmits repliesto the cerebellum andmedullagestaltan organized whole.Gestalt psychologistsemphasized ourtendency to integratepieces of informationinto meaningfulwholes.transductionconversion of one formof energy into another.In sensation, thetransforming ofstimulus energies,such as sights,sounds, and smells,into neural impulsesour brain can interpret.pituitaryglandthe endocrine system'smost influential gland.Under the influence ofthe hypothalamus, thepituitary regulatesgrowth and controlsother endocrineglands.behaviorgeneticsthe study of therelative power andlimits of geneticand environmentalinfluences onbehavior.synapsethe junction betweenthe axon tip of thesending neuron andthe dendrite or cellbody of the receivingneuron. The tiny gap atthis junction is calledthe synaptic gap orsynaptic cleft.figure-groundthe organization ofthe visual field intoobjects (the figures)that stand out fromtheir surroundings(the ground).subliminalbelow one'sabsolutethreshold forconsciousawarenessgate-controltheorythe theory that the spinalcord contains aneurological "gate" thatblocks pain signals orallows them to pass on tothe brain. The "gate" isopened by the activity ofpain signals traveling upsmall nerve fibers and isclosed by activity in largfixed-intervalschedulein operant conditioning,a reinforcementschedule thatreinforces a responseonly after a specifiedtime has elapsed.(Myers Psychology forAP 3e p. 288)innerearthe innermost partof the ear,containing thecochlea,semicircularcanals, andvestibular sacs.RogerSperrylike Gazzaniga,studied split brainpatients; showedthat left/righthemispheres havedifferent functionsendocrinesystemthe body's "slow"chemicalcommunicationsystem; a set ofglands that secretehormones into thebloodstream.electroencephalogram(EEG)an amplified recordingof the waves ofelectrical activitysweeping across thebrain's surface. Thesewaves are measuredby electrodes placedon the scalp.hypothalamusa neural structure lyingbelow (hypo) the thalamus;it directs severalmaintenance activities(eating, drinking, bodytemperature), helps governthe endocrine system viathe pituitary gland, and islinked to emotion andreward.opponent-processtheorythe theory that opposingretinal processes (red-green, blue-yellow, white-black) enable color vision.For example, some cellsare stimulated by greenand inhibited by red; othersare stimulated by red andinhibited by green.fMRI(functionalMRI)a technique forrevealing bloodflowand, therefore, brainactivity by comparingsuccessive MRI scans.fMRI scans show brainfunction as well as itsstructure.cognitivelearningthe acquisition ofmental information,whether by observingevents, by watchingothers, or throughlanguage. (MyersPsychology for AP 3ep. 272)neurona nerve cell;the basicbuilding blockof the nervoussystem.top-downprocessinginformationprocessing guided byhigher-level mentalprocesses, as whenwe constructperceptions drawingon our experienceand expectations.positivereinforcementincreasing behaviors bypresenting positivereinforcers. A positivereinforcer is any stimulusthat, when presented aftera response, strengthensthe response. (MyersPsychology for AP 3e p.285)temporallobesportion of thecerebral cortex lyingroughly above theears; includes theauditory areas, eachreceiving informationprimarily from theopposite ear.acquisitionin classical conditioning theinitial stage, when one linksa neutral stimulus and anunconditioned stimulus sothat the neutral stimulusbegins triggering theconditioned response. Inoperant conditioning, thestrengthening of areinforced responegativereinforcementincreasing behaviors bystopping or reducingaversive stimuli. A negativereinforcer is any stimulusthat, when removed after aresponse, strengthens theresponse. (Note: Negativereinforcement is notpunishment.) (MyersPsychology for AP 3e p. frequencytheoryin hearing, the theorythat the rate of nerveimpulses traveling upthe auditory nervematches the frequencyof a tone, thusenabling us to senseits pitch. (Also calledtemporal theory.)generalizationthe tendency, once aresponse has beenconditioned, for stimulisimilar to the conditionedstimulus to elicit similarresponses. (In operantconditioning, generalizationoccurs when responseslearned in one situationoccur in other, similarsitucerebellumthe "little brain" at therear of the brainstem;functions includeprocessing sensoryinput, coordinatingmovement output andbalance, and enablingnonverbal learning andmemory.reinforcementin operantconditioning, anyevent thatstrengthens thebehavior it follows.(Myers Psychologyfor AP 3e p. 284)parietallobesportion of thecerebral cortex lyingat the top of the headand toward the rear;receives sensoryinput for touch andbody position.EdwardTolmancognitivepsychologist;latent learningand cognitivemapinterneuronsneurons within thebrain and spinal cordthat communicateinternally andintervene betweenthe sensory inputsand motor outputs.unconditionedresponse(UR)in classical conditioning, anunlearned, naturallyoccurring response (suchas salivation) to anunconditioned stimulus(US) (such as food in themouth). (Myers Psychologyfor AP 3e p. 274)perceptionthe process oforganizing andinterpreting sensoryinformation, enablingus to recognizemeaningful objectsand events.actionpotentiala neuralimpulse; a briefelectricalcharge thattravels down anaxon.antagonista molecule that,by binding to areceptor site,inhibits or blocksa response.differencethresholdthe minimum differencebetween two stimulirequired for detection50 percent of the time.We experience thedifference threshold asa just noticeabledifference (or jnd).splitbraina condition resultingfrom surgery thatisolates the brain'stwo hemispheres bycutting the fibers(mainly those of thecorpus callosum)connecting them.inattentionalblindnessfailing to seevisible objectswhen ourattention isdirectedelsewheremotorcortexan area at therear of thefrontal lobesthat controlsvoluntarymovements.CT(computedtomography)scan a series of X-rayphotographs takenfrom different anglesand combined bycomputer into acompositerepresentation of aslice of the brain'sstructure.monocularcuea depth cue, suchas interposition orlinear perspective,available to eithereye alone.discrimination(1) in classical conditioning,the learned ability todistinguish between aconditioned stimulus andsimilar stimuli that do notsignal an unconditionedstimulus. (In operantconditioning, the ability todistinguish responses thatare reinforcedoperantconditioninga type of learning inwhich a behaviorbecomes more likely torecur if followed by areinforcer or less likelyto recur if followed by apunisher. (MyersPsychology for AP 3ep. 283)sensoryadaptationdiminishedsensitivity as aconsequence ofconstantstimulation.myelinsheatha fatty tissue layersegmentally encasingthe axons of someneurons; enablesvastly greatertransmission speed asneural impulses hopfrom one node to thenext.retinaldisparitya binocular cue forperceiving depth. Bycomparing retinal imagesfrom the two eyes, thebrain computes distance—the greater the disparity(difference) between thetwo images, the closer theobjectadrenalglandsa pair of endocrineglands that sit justabove the kidneys andsecrete hormones(epinephrine andnorepinephrine) thathelp arouse the bodyin times of stress.associationareasareas of the cerebral cortexthat are not involved inprimary motor or sensoryfunctions; rather, they areinvolved in higher mentalfunctions such as learning,remembering, thinking, andspeaking.reflexa simple,automaticresponse to asensory stimulus,such as the knee-jerk response.neutralstimulus(NS)in classicalconditioning, astimulus that elicitsno response beforeconditioning. (MyersPsychology for AP 3ep. 273)CarlWernickean area of the brain (inthe left temporal lobe)involved in languagecomprehension andexpression was namedfor him because hediscovered itperceptualconstancyperceiving objects asunchanging (havingconsistent color,brightness, shape,and size) even asillumination andretinal imageschange.conditionedresponse(CR)in classicalconditioning, alearned response toa previously neutral(but now conditioned)stimulus (CS). (MyersPsychology for AP 3ep. 274)unconditionedstimulus (US)in classical conditioning, astimulus thatunconditionally—naturallyand automatically—triggersan unconditioned responseUR). (Myers Psychology forAP 3e p. 274)modelingthe process ofobserving andimitating a specificbehavior. (MyersPsychology for AP3e p. 312)Weber'slawthe principle that, tobe perceived asdifferent, two stimulimust differ by aconstant minimumpercentage (ratherthan a constantamount).cerebralcortexthe intricate fabric ofinterconnected neuralcells covering thecerebral hemispheres;the body's ultimatecontrol andinformation-processingcenter.intensitythe amount of energyin a light wave orsound wave, whichinfluences what weperceive as brightnessor loudness. Intensityis determined by thewave's amplitude(height).depthperceptionthe ability to seeobjects in threedimensions althoughthe images that strikethe retina are two-dimensional; allowsus to judge distance.PET(positronemissiontomography)scan a visual displayof brain activity thatdetects where aradioactive form ofglucose goes whilethe brain performs agiven task.foveathe central focalpoint in theretina, aroundwhich the eye'scones cluster.primaryreinforceran innatelyreinforcing stimulus,such as one thatsatisfies a biologicalneed. (MyersPsychology for AP 3ep. 286)centralnervoussystem(CNS)the brainand spinalcord.bottom-upprocessinganalysis that beginswith the sensoryreceptors and worksup to the brain'sintegration of sensoryinformation.refractoryperioda period ofinactivityafter aneuron hasfired.spontaneousrecoverythe reappearance,after a pause, of anextinguishedconditionedresponse. (MyersPsychology for AP 3ep. 276)punishmentan event thattends to decreasethe behavior that itfollows. (MyersPsychology for AP3e p. 289)kinesthesiaour movement sense—our system forsensing the positionand movement ofindividual body arts.placetheoryin hearing, the theorythat links the pitch wehear with the placewhere the cochlea'smembrane isstimulated.axonthe neuron extensionthat passesmessages through itsbranches to otherneurons or tomuscles or glands.pupilthe adjustableopening in thecenter of theeye throughwhich lightenters.motionparallaxmonocular depthcues in whichobjects closer to usseem to move at afaster pace thanthose that arefarther away,IvanPavlovRussian physiologist;discovered classicalconditioning; traineddogs to salivate atthe ringing of a bellconsciousnessourawarenessof ourselvesand ourenvironment.signaldetectiontheorya theory predicting howand when we detect thepresence of a faint stimulus(signal) amid backgroundstimulation (noise).Assumes there is no singleabsolute threshold and thatdetection depends partlyon a person's experience,expectations, motiparasympatheticnervous systemthe division of theautonomicnervous systemthat calms thebody, conservingits energyopticnervethe nerve thatcarries neuralimpulsesfrom the eyeto the brain.frequencythe number ofcompletewavelengths thatpass a point in agiven time (forexample, persecond).wavelengththe distance from the peakof one light or sound waveto the peak of the next.Electromagneticwavelengths vary from theshort blips of gamma raysto the long pulses of radiotransmission. (MyersPsychology for AP 3e p.177)olfactionthesense ofsmell.perceptualseta mentalpredispositionto perceiveone thing andnot another.sensoryreceptorssensorynerveendings thatrespond tostimuli.amygdalatwo lima-bean-sized neuralclusters in thelimbic system;linked toemotion.retinathe light-sensitiveinner surface of theeye, containing thereceptor rods andcones plus layers ofneurons that beginthe processing ofvisual information.dendritesa neuron's bushy,branching extensionsthat receivemessages andconduct impulsestoward the cell body.latentlearninglearning that occursbut is not apparentuntil there is anincentive todemonstrate it.(Myers Psychologyfor AP 3e p. 304)conductionhearinglossa less common formof hearing loss,caused by damage tothe mechanicalsystem that conductssound waves to thecochlea.pitcha tone'sexperiencedhighness orlowness;depends onfrequency.fixed-ratioschedulein operant conditioning,a reinforcementschedule thatreinforces a responseonly after a specifiednumber of responses.(Myers Psychology forAP 3e p. 288)rodsretinal receptors thatdetect black, white,and gray, and aresensitive to movement;necessary forperipheral and twilightvision, when conesdon't respond.observationallearninglearning byobserving others.(Also called sociallearning.) (MyersPsychology for AP3e p. 312)corneathe eye's clear,protective outerlayer, coveringthe pupil andiris.frontallobesportion of thecerebral cortex lyingjust behind theforehead; involved inspeaking and musclemovements and inmaking plans andjudgments.sympatheticnervoussystemthe division of theautonomic nervoussystem that arousesthe body, mobilizingits energy in stressfulsituations.reticularformationa nerve network thattravels through thebrainstem andthalamus and playsan important role incontrolling arousal.medullathe base of thebrainstem;controls heart-beat andbreathing.Young-Helmholtztrichromatic(three-color)theorythe theory that the retinacontains three differenttypes of color receptors—one most sensitive to red,one to green, one to blue—which, when stimulated incombination, can producethe perception of any colornervesbundled axons thatform neural "cables"connecting thecentral nervoussystem with muscles,glands, and senseorgans.shapingan operantconditioning procedurein which reinforcersguide behavior towardcloser and closerapproximations of thedesired behavior.(Myers Psychology forAP 3e p. 284)huethe dimension ofcolor that isdetermined by thewavelength of light;what we know as thecolor names blue,green, and so forth.heritabilitythe proportion ofvariation amongindividuals that we canattribute to genes. Theheritability of a traitmay vary, dependingon the range ofpopulations andenvironments studied.PaulBrocadiscovered area inthe brain (namedfor him) in the leftfrontal loberesponsible forlanguageproductionB.F.SkinnerBehaviorist thatdeveloped thetheory of operantconditioning bytraining pigeonsand ratscontinuousreinforcementschedulereinforcing thedesired responseevery time itoccurs. (MyersPsychology for AP3e p. 287)phiphenomenonan illusion ofmovement createdwhen two or moreadjacent lights blinkon and off in quicksuccessionchangeblindnessfailing to noticechanges in theenvironment; aform ofinattentionalblindness.mirrorneuronsfrontal lobe neurons thatsome scientists believe firewhen we perform certainactions or observe anotherdoing so. The brain'smirroring of another'saction may enable imitationand empathy. (MyersPsychology for AP 3e p.313)classicalconditioninga type of learning in whichwe link two or more stimuli;as a result, to illustrate withPavlov's classicexperiment, the firststimulus (a tone) comes toelicit behavior (drooling) inanticipation of the secondstimulus (food). (MyersPsychologycochleaa coiled, bony, fluid-filled tube in the innerear; sound wavestraveling through thecochlear fluid triggernerve impulses.brainstemthe oldest part andcentral core of thebrain, beginning wherethe spinal cord swellsas it enters the skull;the brainstem isresponsible forautomatic survivalfunctionsparrallelprocessingthe processingof manyaspects of aproblemsimultaneouslyneurotransmitterschemical messengers thatcross the synaptic gapsbetween neurons. Whenreleased by the sendingneuron, neurotransmitterstravel across the synapseand bind to receptor siteson the receiving neuron,thereby influencing whetherthat neuron will gecolorconstancyperceiving familiarobjects as havingconsistent color, evenif changingillumination alters thewavelengthsreflected by theobject.motor(efferent)neuronsneurons that carryoutgoinginformation fromthe brain andspinal cord to themuscles andglands.learnedhelplessnessthe hopelessness andpassive resignation ananimal or personlearns when unable toavoid repeatedaversive events.(Myers Psychology forAP 3e p. 307)sensory(afferent)neuronsneurons that carryincominginformation fromthe sensoryreceptors to thebrain and spinalcordprimingthe activation, oftenunconsciously, ofcertain associations,thus predisposingone's perception,memory, orresponse.glialcells(glia)cells in the nervoussystem that support,nourish, and protectneurons; they mayalso play a role inlearning and thinking.variable-intervalschedulein operant conditioning,a reinforcementschedule thatreinforces a responseat unpredictable timeintervals. (MyersPsychology for AP 3ep. 288)limbicsystemneural system(including thehippocampus,amygdala, andhypothalamus) locatedbelow the cerebralhemispheres;associated withemotions and drives.irisa ring of muscletissue that forms thecolored portion of theeye around the pupiland controls the sizeof the pupil opening.selectiveattentionthe focusingof consciousawareness ona particularstimuluscognitivemapa mental representation ofthe layout of one'senvironment. For example,after exploring a maze, ratsact as if they have learneda cognitive map of it.(Myers Psychology for AP3e p. 304)featuredetectorsnerve cells in thebrain's visual cortexthat respond tospecific features ofthe stimulus, such asshape, angle, ormovement.auditionthe senseor act ofhearing.sensationthe process by whichour sensoryreceptors andnervous systemreceive andrepresent stimulusenergies from ourenvironment.somatosensorycortexarea at the front ofthe parietal lobes thatregisters andprocesses bodytouch and movementsensations.agonista molecule that,by binding to areceptor site,stimulates aresponselesiontissue destruction. Abrain lesion is anaturally orexperimentallycaused destruction ofbrain tissue.MichaelGazzanigasplit-brain research;understanding offunctionallateralization in thebrain; how thecerebral hemispherescommunicatesensorineuralhearing losshearing loss caused bydamage to thecochlea's receptor cellsor to the auditorynerves; the mostcommon form ofhearing loss, alsocalled nerve deafness.conesretinal receptors thatare concentrated nearthe center of the retinaand that function indaylight or in well-litconditions. Conesdetect fine detail andgive rise to colorsensations.corpuscallosumthe large band ofneural fibersconnecting the twobrain hemispheresand carryingmessages betweenthem.variable-ratioschedulein operant conditioning,a reinforcementschedule thatreinforces a responseafter an unpredictablenumber of responses.(Myers Psychology forAP 3e p. 288)extinctionthe diminishing of aconditioned response; occursin classical conditioning whenan unconditioned stimulus(US) does not follow aconditioned stimulus (CS);occurs in operant conditioningwhen a response is no longerreinforced. (Myers Psychologysomaticnervoussystemthe division of theperipheral nervoussystem that controlsthe body's skeletalmuscles. (Also calledthe skeletal nervoussystem.)all-or-noneresponsea neuron'sreaction of eitherfiring (with a full-strength response)or not firing.vestibularsenseour sense of bodymovement andposition thatenables our senseof balance.neurogenesistheformationof newneurons.plasticitythe brain's ability tochange, especiallyduring childhood, byreorganizing afterdamage or bybuilding newpathways based onexperience.higher-orderconditioninga procedure in which theconditioned stimulus in oneconditioning experience ispaired with a new neutralstimulus, creating a second(often weaker) conditionedstimulus. For example, ananimal that has learnedthat a tone predicts foodmight theMRI(magneticresonanceimaging)a technique that usesmagnetic fields andradio waves toproduce computer -generated images ofsoft tissue. MRIscans show brainanatomy.insighta sudden realizationof a problem'ssolution; contrastswith strategy-basedsolutions. (MyersPsychology for AP 3epp. 304, 370)reuptakeaneurotransmitter'sreabsorption bythe sendingneuron.JohnB.Watsonbehaviorism; emphasison external behaviorsof people and theirreactions on a givensituation; famous forLittle Albert study inwhich baby was taughtto fear a white ratnervoussystemthe body's speedy,electrochemicalcommunicationnetwork, consisting ofall the nerve cells ofthe peripheral andcentral nervoussystems.habituationdecreasingresponsiveness withrepeated exposure toa stimulus. (MyersPsychology for AP 3epp. 271, 491)hormoneschemicalmessengers that aremanufactured by theendocrine glands,travel through thebloodstream, andaffect other tissues.conditionedstimulus(CS)in classical conditioning, anoriginally neutral stimulusthat, after association withan unconditioned stimulus(US), comes to trigger aconditioned response (CR).(Myers Psychology for AP3e p. 274)lensthe transparentstructure behindthe pupil thatchanges shape tohelp focus imageson the retina.occipitallobesportion of thecerebral cortex lyingat the back of thehead; includes areasthat receiveinformation from thevisual fields.

AP PSYCH- Units 3, 4 & 5 - Call List

(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.


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  1. Thorndike's principle that behaviors followed by favorable consequences become more likely, and that behaviors followed by unfavorable consequences become less likely. (Myers Psychology for AP 3e p. 283)
    law of effect
  2. researcher famous for work in observational or social learning including the famous Bobo doll experiment
    Albert Bandura
  3. the level of stimulation required to trigger a neural impulse.
    threshold
  4. Pioneer in operant conditioning who discovered concepts in instrumental learning such as the law of effect. Known for his work with cats in puzzle boxes.
    Edward Thorndike
  5. the sensory and motor neurons that connect the central nervous system (CNS) to the rest of the body.
    peripheral nervous system (PNS)
  6. reinforcing a response only part of the time; results in slower acquisition of a response but much greater resistance to extinction than does continuous reinforcement. (Myers Psychology for AP 3e p. 287)
    partial (intermittent) reinforcement schedule
  7. a depth cue, such as retinal disparity, that depends on the use of two eyes.
    binocular cue
  8. the chamber between the eardrum and cochlea containing three tiny bones (hammer, anvil, and stirrup) that concentrate the vibrations of the eardrum on the cochlea's oval window.
    middle ear
  9. the principle that information is often simultaneously processed on separate conscious and unconscious tracks
    dual processing
  10. the part of the peripheral nervous system that controls the glands and the muscles of the internal organs (such as the heart). Its sympathetic division arouses; its parasympathetic division calms.
    autonomic nervous system (ANS)
  11. "morphine within"—natural, opiate-like neurotransmitters linked to pain control and to pleasure.
    endorphins
  12. a stimulus that gains its reinforcing power through its association with a primary reinforcer
    secondary (conditioned) reinforcer
  13. the point at which the optic nerve leaves the eye, creating a "blind" spot because no receptor cells are located there.
    blind spot
  14. the brain's sensory control center, located on top of the brainstem; it directs messages to the sensory receiving areas in the cortex and transmits replies to the cerebellum and medulla
    thalamus
  15. an organized whole. Gestalt psychologists emphasized our tendency to integrate pieces of information into meaningful wholes.
    gestalt
  16. conversion of one form of energy into another. In sensation, the transforming of stimulus energies, such as sights, sounds, and smells, into neural impulses our brain can interpret.
    transduction
  17. the endocrine system's most influential gland. Under the influence of the hypothalamus, the pituitary regulates growth and controls other endocrine glands.
    pituitary gland
  18. the study of the relative power and limits of genetic and environmental influences on behavior.
    behavior genetics
  19. the junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. The tiny gap at this junction is called the synaptic gap or synaptic cleft.
    synapse
  20. the organization of the visual field into objects (the figures) that stand out from their surroundings (the ground).
    figure-ground
  21. below one's absolute threshold for conscious awareness
    subliminal
  22. the theory that the spinal cord contains a neurological "gate" that blocks pain signals or allows them to pass on to the brain. The "gate" is opened by the activity of pain signals traveling up small nerve fibers and is closed by activity in larg
    gate-control theory
  23. in operant conditioning, a reinforcement schedule that reinforces a response only after a specified time has elapsed. (Myers Psychology for AP 3e p. 288)
    fixed-interval schedule
  24. the innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs.
    inner ear
  25. like Gazzaniga, studied split brain patients; showed that left/right hemispheres have different functions
    Roger Sperry
  26. the body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream.
    endocrine system
  27. an amplified recording of the waves of electrical activity sweeping across the brain's surface. These waves are measured by electrodes placed on the scalp.
    electroencephalogram (EEG)
  28. a neural structure lying below (hypo) the thalamus; it directs several maintenance activities (eating, drinking, body temperature), helps govern the endocrine system via the pituitary gland, and is linked to emotion and reward.
    hypothalamus
  29. the theory that opposing retinal processes (red-green, blue-yellow, white-black) enable color vision. For example, some cells are stimulated by green and inhibited by red; others are stimulated by red and inhibited by green.
    opponent-process theory
  30. a technique for revealing bloodflow and, therefore, brain activity by comparing successive MRI scans. fMRI scans show brain function as well as its structure.
    fMRI (functional MRI)
  31. the acquisition of mental information, whether by observing events, by watching others, or through language. (Myers Psychology for AP 3e p. 272)
    cognitive learning
  32. a nerve cell; the basic building block of the nervous system.
    neuron
  33. information processing guided by higher-level mental processes, as when we construct perceptions drawing on our experience and expectations.
    top-down processing
  34. increasing behaviors by presenting positive reinforcers. A positive reinforcer is any stimulus that, when presented after a response, strengthens the response. (Myers Psychology for AP 3e p. 285)
    positive reinforcement
  35. portion of the cerebral cortex lying roughly above the ears; includes the auditory areas, each receiving information primarily from the opposite ear.
    temporal lobes
  36. in classical conditioning the initial stage, when one links a neutral stimulus and an unconditioned stimulus so that the neutral stimulus begins triggering the conditioned response. In operant conditioning, the strengthening of a reinforced respo
    acquisition
  37. increasing behaviors by stopping or reducing aversive stimuli. A negative reinforcer is any stimulus that, when removed after a response, strengthens the response. (Note: Negative reinforcement is not punishment.) (Myers Psychology for AP 3e p.
    negative reinforcement
  38. in hearing, the theory that the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone, thus enabling us to sense its pitch. (Also called temporal theory.)
    frequency theory
  39. the tendency, once a response has been conditioned, for stimuli similar to the conditioned stimulus to elicit similar responses. (In operant conditioning, generalization occurs when responses learned in one situation occur in other, similar situ
    generalization
  40. the "little brain" at the rear of the brainstem; functions include processing sensory input, coordinating movement output and balance, and enabling nonverbal learning and memory.
    cerebellum
  41. in operant conditioning, any event that strengthens the behavior it follows. (Myers Psychology for AP 3e p. 284)
    reinforcement
  42. portion of the cerebral cortex lying at the top of the head and toward the rear; receives sensory input for touch and body position.
    parietal lobes
  43. cognitive psychologist; latent learning and cognitive map
    Edward Tolman
  44. neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs.
    interneurons
  45. in classical conditioning, an unlearned, naturally occurring response (such as salivation) to an unconditioned stimulus (US) (such as food in the mouth). (Myers Psychology for AP 3e p. 274)
    unconditioned response (UR)
  46. the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events.
    perception
  47. a neural impulse; a brief electrical charge that travels down an axon.
    action potential
  48. a molecule that, by binding to a receptor site, inhibits or blocks a response.
    antagonist
  49. the minimum difference between two stimuli required for detection 50 percent of the time. We experience the difference threshold as a just noticeable difference (or jnd).
    difference threshold
  50. a condition resulting from surgery that isolates the brain's two hemispheres by cutting the fibers (mainly those of the corpus callosum) connecting them.
    split brain
  51. failing to see visible objects when our attention is directed elsewhere
    inattentional blindness
  52. an area at the rear of the frontal lobes that controls voluntary movements.
    motor cortex
  53. scan a series of X-ray photographs taken from different angles and combined by computer into a composite representation of a slice of the brain's structure.
    CT (computed tomography)
  54. a depth cue, such as interposition or linear perspective, available to either eye alone.
    monocular cue
  55. (1) in classical conditioning, the learned ability to distinguish between a conditioned stimulus and similar stimuli that do not signal an unconditioned stimulus. (In operant conditioning, the ability to distinguish responses that are reinforced
    discrimination
  56. a type of learning in which a behavior becomes more likely to recur if followed by a reinforcer or less likely to recur if followed by a punisher. (Myers Psychology for AP 3e p. 283)
    operant conditioning
  57. diminished sensitivity as a consequence of constant stimulation.
    sensory adaptation
  58. a fatty tissue layer segmentally encasing the axons of some neurons; enables vastly greater transmission speed as neural impulses hop from one node to the next.
    myelin sheath
  59. a binocular cue for perceiving depth. By comparing retinal images from the two eyes, the brain computes distance—the greater the disparity (difference) between the two images, the closer the object
    retinal disparity
  60. a pair of endocrine glands that sit just above the kidneys and secrete hormones (epinephrine and norepinephrine) that help arouse the body in times of stress.
    adrenal glands
  61. areas of the cerebral cortex that are not involved in primary motor or sensory functions; rather, they are involved in higher mental functions such as learning, remembering, thinking, and speaking.
    association areas
  62. a simple, automatic response to a sensory stimulus, such as the knee-jerk response.
    reflex
  63. in classical conditioning, a stimulus that elicits no response before conditioning. (Myers Psychology for AP 3e p. 273)
    neutral stimulus (NS)
  64. an area of the brain (in the left temporal lobe) involved in language comprehension and expression was named for him because he discovered it
    Carl Wernicke
  65. perceiving objects as unchanging (having consistent color, brightness, shape, and size) even as illumination and retinal images change.
    perceptual constancy
  66. in classical conditioning, a learned response to a previously neutral (but now conditioned) stimulus (CS). (Myers Psychology for AP 3e p. 274)
    conditioned response (CR)
  67. in classical conditioning, a stimulus that unconditionally—naturally and automatically—triggers an unconditioned response UR). (Myers Psychology for AP 3e p. 274)
    unconditioned stimulus (US)
  68. the process of observing and imitating a specific behavior. (Myers Psychology for AP 3e p. 312)
    modeling
  69. the principle that, to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than a constant amount).
    Weber's law
  70. the intricate fabric of interconnected neural cells covering the cerebral hemispheres; the body's ultimate control and information-processing center.
    cerebral cortex
  71. the amount of energy in a light wave or sound wave, which influences what we perceive as brightness or loudness. Intensity is determined by the wave's amplitude (height).
    intensity
  72. the ability to see objects in three dimensions although the images that strike the retina are two-dimensional; allows us to judge distance.
    depth perception
  73. scan a visual display of brain activity that detects where a radioactive form of glucose goes while the brain performs a given task.
    PET (positron emission tomography)
  74. the central focal point in the retina, around which the eye's cones cluster.
    fovea
  75. an innately reinforcing stimulus, such as one that satisfies a biological need. (Myers Psychology for AP 3e p. 286)
    primary reinforcer
  76. the brain and spinal cord.
    central nervous system (CNS)
  77. analysis that begins with the sensory receptors and works up to the brain's integration of sensory information.
    bottom-up processing
  78. a period of inactivity after a neuron has fired.
    refractory period
  79. the reappearance, after a pause, of an extinguished conditioned response. (Myers Psychology for AP 3e p. 276)
    spontaneous recovery
  80. an event that tends to decrease the behavior that it follows. (Myers Psychology for AP 3e p. 289)
    punishment
  81. our movement sense—our system for sensing the position and movement of individual body arts.
    kinesthesia
  82. in hearing, the theory that links the pitch we hear with the place where the cochlea's membrane is stimulated.
    place theory
  83. the neuron extension that passes messages through its branches to other neurons or to muscles or glands.
    axon
  84. the adjustable opening in the center of the eye through which light enters.
    pupil
  85. monocular depth cues in which objects closer to us seem to move at a faster pace than those that are farther away,
    motion parallax
  86. Russian physiologist; discovered classical conditioning; trained dogs to salivate at the ringing of a bell
    Ivan Pavlov
  87. our awareness of ourselves and our environment.
    consciousness
  88. a theory predicting how and when we detect the presence of a faint stimulus (signal) amid background stimulation (noise). Assumes there is no single absolute threshold and that detection depends partly on a person's experience, expectations, moti
    signal detection theory
  89. the division of the autonomic nervous system that calms the body, conserving its energy
    parasympathetic nervous system
  90. the nerve that carries neural impulses from the eye to the brain.
    optic nerve
  91. the number of complete wavelengths that pass a point in a given time (for example, per second).
    frequency
  92. the distance from the peak of one light or sound wave to the peak of the next. Electromagnetic wavelengths vary from the short blips of gamma rays to the long pulses of radio transmission. (Myers Psychology for AP 3e p. 177)
    wavelength
  93. the sense of smell.
    olfaction
  94. a mental predisposition to perceive one thing and not another.
    perceptual set
  95. sensory nerve endings that respond to stimuli.
    sensory receptors
  96. two lima-bean-sized neural clusters in the limbic system; linked to emotion.
    amygdala
  97. the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.
    retina
  98. a neuron's bushy, branching extensions that receive messages and conduct impulses toward the cell body.
    dendrites
  99. learning that occurs but is not apparent until there is an incentive to demonstrate it. (Myers Psychology for AP 3e p. 304)
    latent learning
  100. a less common form of hearing loss, caused by damage to the mechanical system that conducts sound waves to the cochlea.
    conduction hearing loss
  101. a tone's experienced highness or lowness; depends on frequency.
    pitch
  102. in operant conditioning, a reinforcement schedule that reinforces a response only after a specified number of responses. (Myers Psychology for AP 3e p. 288)
    fixed-ratio schedule
  103. retinal receptors that detect black, white, and gray, and are sensitive to movement; necessary for peripheral and twilight vision, when cones don't respond.
    rods
  104. learning by observing others. (Also called social learning.) (Myers Psychology for AP 3e p. 312)
    observational learning
  105. the eye's clear, protective outer layer, covering the pupil and iris.
    cornea
  106. portion of the cerebral cortex lying just behind the forehead; involved in speaking and muscle movements and in making plans and judgments.
    frontal lobes
  107. the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations.
    sympathetic nervous system
  108. a nerve network that travels through the brainstem and thalamus and plays an important role in controlling arousal.
    reticular formation
  109. the base of the brainstem; controls heart-beat and breathing.
    medulla
  110. the theory that the retina contains three different types of color receptors—one most sensitive to red, one to green, one to blue—which, when stimulated in combination, can produce the perception of any color
    Young-Helmholtz trichromatic (three-color) theory
  111. bundled axons that form neural "cables" connecting the central nervous system with muscles, glands, and sense organs.
    nerves
  112. an operant conditioning procedure in which reinforcers guide behavior toward closer and closer approximations of the desired behavior. (Myers Psychology for AP 3e p. 284)
    shaping
  113. the dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth.
    hue
  114. the proportion of variation among individuals that we can attribute to genes. The heritability of a trait may vary, depending on the range of populations and environments studied.
    heritability
  115. discovered area in the brain (named for him) in the left frontal lobe responsible for language production
    Paul Broca
  116. Behaviorist that developed the theory of operant conditioning by training pigeons and rats
    B.F. Skinner
  117. reinforcing the desired response every time it occurs. (Myers Psychology for AP 3e p. 287)
    continuous reinforcement schedule
  118. an illusion of movement created when two or more adjacent lights blink on and off in quick succession
    phi phenomenon
  119. failing to notice changes in the environment; a form of inattentional blindness.
    change blindness
  120. frontal lobe neurons that some scientists believe fire when we perform certain actions or observe another doing so. The brain's mirroring of another's action may enable imitation and empathy. (Myers Psychology for AP 3e p. 313)
    mirror neurons
  121. a type of learning in which we link two or more stimuli; as a result, to illustrate with Pavlov's classic experiment, the first stimulus (a tone) comes to elicit behavior (drooling) in anticipation of the second stimulus (food). (Myers Psychology
    classical conditioning
  122. a coiled, bony, fluid-filled tube in the inner ear; sound waves traveling through the cochlear fluid trigger nerve impulses.
    cochlea
  123. the oldest part and central core of the brain, beginning where the spinal cord swells as it enters the skull; the brainstem is responsible for automatic survival functions
    brainstem
  124. the processing of many aspects of a problem simultaneously
    parrallel processing
  125. chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will ge
    neurotransmitters
  126. perceiving familiar objects as having consistent color, even if changing illumination alters the wavelengths reflected by the object.
    color constancy
  127. neurons that carry outgoing information from the brain and spinal cord to the muscles and glands.
    motor (efferent) neurons
  128. the hopelessness and passive resignation an animal or person learns when unable to avoid repeated aversive events. (Myers Psychology for AP 3e p. 307)
    learned helplessness
  129. neurons that carry incoming information from the sensory receptors to the brain and spinal cord
    sensory (afferent) neurons
  130. the activation, often unconsciously, of certain associations, thus predisposing one's perception, memory, or response.
    priming
  131. cells in the nervous system that support, nourish, and protect neurons; they may also play a role in learning and thinking.
    glial cells (glia)
  132. in operant conditioning, a reinforcement schedule that reinforces a response at unpredictable time intervals. (Myers Psychology for AP 3e p. 288)
    variable-interval schedule
  133. neural system (including the hippocampus, amygdala, and hypothalamus) located below the cerebral hemispheres; associated with emotions and drives.
    limbic system
  134. a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.
    iris
  135. the focusing of conscious awareness on a particular stimulus
    selective attention
  136. a mental representation of the layout of one's environment. For example, after exploring a maze, rats act as if they have learned a cognitive map of it. (Myers Psychology for AP 3e p. 304)
    cognitive map
  137. nerve cells in the brain's visual cortex that respond to specific features of the stimulus, such as shape, angle, or movement.
    feature detectors
  138. the sense or act of hearing.
    audition
  139. the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.
    sensation
  140. area at the front of the parietal lobes that registers and processes body touch and movement sensations.
    somatosensory cortex
  141. a molecule that, by binding to a receptor site, stimulates a response
    agonist
  142. tissue destruction. A brain lesion is a naturally or experimentally caused destruction of brain tissue.
    lesion
  143. split-brain research; understanding of functional lateralization in the brain; how the cerebral hemispheres communicate
    Michael Gazzaniga
  144. hearing loss caused by damage to the cochlea's receptor cells or to the auditory nerves; the most common form of hearing loss, also called nerve deafness.
    sensorineural hearing loss
  145. retinal receptors that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. Cones detect fine detail and give rise to color sensations.
    cones
  146. the large band of neural fibers connecting the two brain hemispheres and carrying messages between them.
    corpus callosum
  147. in operant conditioning, a reinforcement schedule that reinforces a response after an unpredictable number of responses. (Myers Psychology for AP 3e p. 288)
    variable-ratio schedule
  148. the diminishing of a conditioned response; occurs in classical conditioning when an unconditioned stimulus (US) does not follow a conditioned stimulus (CS); occurs in operant conditioning when a response is no longer reinforced. (Myers Psychology
    extinction
  149. the division of the peripheral nervous system that controls the body's skeletal muscles. (Also called the skeletal nervous system.)
    somatic nervous system
  150. a neuron's reaction of either firing (with a full-strength response) or not firing.
    all-or-none response
  151. our sense of body movement and position that enables our sense of balance.
    vestibular sense
  152. the formation of new neurons.
    neurogenesis
  153. the brain's ability to change, especially during childhood, by reorganizing after damage or by building new pathways based on experience.
    plasticity
  154. a procedure in which the conditioned stimulus in one conditioning experience is paired with a new neutral stimulus, creating a second (often weaker) conditioned stimulus. For example, an animal that has learned that a tone predicts food might the
    higher-order conditioning
  155. a technique that uses magnetic fields and radio waves to produce computer -generated images of soft tissue. MRI scans show brain anatomy.
    MRI (magnetic resonance imaging)
  156. a sudden realization of a problem's solution; contrasts with strategy-based solutions. (Myers Psychology for AP 3e pp. 304, 370)
    insight
  157. a neurotransmitter's reabsorption by the sending neuron.
    reuptake
  158. behaviorism; emphasis on external behaviors of people and their reactions on a given situation; famous for Little Albert study in which baby was taught to fear a white rat
    John B. Watson
  159. the body's speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous systems.
    nervous system
  160. decreasing responsiveness with repeated exposure to a stimulus. (Myers Psychology for AP 3e pp. 271, 491)
    habituation
  161. chemical messengers that are manufactured by the endocrine glands, travel through the bloodstream, and affect other tissues.
    hormones
  162. in classical conditioning, an originally neutral stimulus that, after association with an unconditioned stimulus (US), comes to trigger a conditioned response (CR). (Myers Psychology for AP 3e p. 274)
    conditioned stimulus (CS)
  163. the transparent structure behind the pupil that changes shape to help focus images on the retina.
    lens
  164. portion of the cerebral cortex lying at the back of the head; includes areas that receive information from the visual fields.
    occipital lobes