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AP Psychology First 250 Flashcards Flashcards

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1379041695Introspection (Wundt)a conscious mental and usually purposive process relying on thinking, reasoning, and examining one's own thoughts feelings. Wundt believed that by using introspection he could determine the basic elements of consciousness.0
1379041696Behavioral School of Psychology (Skinner & Watson)Seeks to explain animal and human behavior entirely in terms of observable and measurable responses to environmental stimuli. Use classical and operant conditioning1
1379041697Humanist School of Psychology (Maslow, Rogers)Focuses on the uniqueness of human beings and their capacity for choice, growth, and health; Believe that people have free will and are not controlled by the environment or their past2
1379041698Psychoanalytic School of Psychology (Freud)"believes that a lot of our personality and behaviors are controlled by our unconscious; another big factor guiding behavior is sex and aggression; Believed that we Defense Mechanisms to protect our conscious mind3
1379041699Neurobiological School of PsychologyEmphasizes that all actions, feelings, and thoughts are associated with bodily events such as the firing of nerve cells in the brain or the release of hormones; This includes studying the brain, hormones and genes to explain behavior4
1379041700Socio-cultural School of Psychology (AKA "Cross-cultural", etc.)Studies the differences among cultures and the influences of culture on behavior; States that we have a tendency to use our own culture as a standard for judging other cultures (a term called ethnocentrism)5
1379041701Evolutionary School of Psychologytheoretical approach to psychology that attempts to explain mental and psychological traits—such as memory, perception, or language—as adaptations, i.e., as the functional products of natural selection or sexual selection.6
1379041702Cognitive School of PsychologyFocuses on the important role of mental processes in how people process information, develop language, solve problems and think. Interested in how people understand, diagnose, and solve problems7
1379041703Clinical Psychologistassess and treat mental, emotional, and behavioral disorders. These range from short-term crises, such as difficulties resulting from adolescent rebellion, to more severe, chronic conditions such as schizophrenia.8
1379041704Counseling psychologisthelp people recognize their strengths and resources to cope with their problems within families, marriages, and adjustment to new conditions. perform therapy, teaching, and scientific research with individuals of all ages, families, and organizations.9
1379041705Cognitive and Perceptual Psychologistsstudy human perception, thinking, and memory; also study reasoning, judgment, and decision making.10
1379041706Developmental Psychologiststudy the psychological growth of the human being that takes place throughout life. Until recently, the primary focus was on childhood and adolescence, the most formative years. Recently expanded to all of life, especially older age.11
1379041707Educational Psychologistconcentrate on how effective teaching and learning take place. They consider a variety of factors, such as human abilities, student motivation, and the effect on the classroom of the diversity of race, ethnicity, and culture that makes up America.12
1379041708Engineering Psychologistconduct research on how people work best with machines. EX: how can a computer be designed to prevent fatigue and eye strain? What arrangement of an assembly line makes production most efficient? What is a reasonable workload?13
1379041709Evolutionary Psychologiststudy how evolutionary principles such as mutation, adaptation, and selective fitness influence human thought, feeling, and behavior. Study mating, aggression, helping behavior, and communication.14
1379041710Experimental Psychologistare interested in a wide range of psychological phenomena, including cognitive processes, comparative psychology (cross-species comparisons), learning and conditioning. Often engage in basic research15
1379041711Forensic Psychologistapply psychological principles to legal issues. Their expertise is often essential in court. EX: help a judge decide which parent should have custody of a child or evaluate a defendant's mental competence to stand trial.16
1379041712Health Psychologistspecialize in how biological, psychological, and social factors affect health and illness. They study how patients handle illness; why some people don't follow medical advice; and the most effective ways to control pain or to change poor health habits.17
1379041713Industrial/Organizational Psychologistapply psychology to the work place in the interest of improving productivity and the quality of work life. Many serve as human resources specialists, helping organizations with staffing, training, and employee development.18
1379041714Neuropsychologistexplore the relationships between brain systems and behavior. EX: may study the way the brain creates and stores memories, or how various diseases and injuries of the brain affect emotion, perception, and behavior.19
1379041715Quantitative and measurement psychologistfocus on methods and techniques for designing experiments and analyzing psychological data. They develop and evaluate mathematical models for psychological tests, among many other things20
1379041716School Psychologistwork directly with public and private schools. They assess and counsel students, consult with parents and school staff, and conduct behavioral interventions when appropriate. Most school districts employ psychologists full time21
1379041717Social Psychologiststudy how a person's mental life and behavior are shaped by interactions with other people. They are interested in all aspects of interpersonal relationships, including both individual and group influences. EX: study effects of prejudice22
1379041718Sports Psychologisthelp athletes refine their focus on competition goals, become more motivated, and learn to deal with the anxiety and fear of failure that often accompany competition.23
1379041719Rehabilitation PsychologistThey deal with issues of personal adjustment, interpersonal relations, the work world, and pain management. work with stroke and accident victims, people with mental retardation, etc.24
1379041720psychiatristthey can prescribe drugs unlike psychologists. Begin their careers in medical school, unlike psychologists that get bachelors in psychology. After earning their MD, they go on to four years of residency training in mental health25
1379041721basic researchhas as its objective the advancement of knowledge. It is exploratory and often driven by the researcher's curiosity, interest, and intuition. It is conducted without any practical end in mind, though it may later have an application26
1379041722applied researchresearch is designed to solve practical problems of the modern world, rather than to acquire knowledge for knowledge's sake. Often has a very particular end in mind. EX: Curing cancer27
1379041723populationall of the individuals in the group to which the study applies28
1379041724anchoring effectthe tendency to be influenced by a suggested reference point, pulling our response towards that point29
1379041725actor-observer biastendency to focus on our own situations and the other person rather than his/her situation when interpreting behavior30
1379041726hindsight biasa tendency to falsely report, after the event, that we correctly predicted the outcome of the event.31
1379041727overconfidence biasthe tendency to overestimate the accuracy of one's beliefs and judgments, which proves to be a hindrance in problem solving32
1379041728confirmation biasa tendency to search for and use information that supports our preconceptions and ignore information that refutes our ideas; often a hindrance to problem solving.33
1379041729illusory correlationthe phenomenon of seeing the relationship one expects in a set of data even when no such relationship exists. EX: When people form false associations between membership in a statistical minority group and rare behaviors34
1379041730false-consensus effectthe tendency of a person to perceive his or her own views as representative of a general consensus35
1379041731case studyintensive investigation of the behavior and mental processes associated with a specific person or situation36
1379041732surveyresearch method that obtains large samples of abilities, beliefs, or behaviors at a specific time and place through questionnaire or interview37
1379041733random sample (AKA "random selection")choosing of members of a population so that every individual has an equal chance of being chosen38
1379041734naturalistic observationresearch method that records behaviors of humans or other animals in real-life situations without intervention39
1379041735Correlation Studyexpresses the relationship between 2 variables; DOES NOT IMPLY CAUSATION40
1379041736positive correlationin correlation, the two factors are going in the same direction. EX: As the temperature goes up, more people buy snow cones41
1379041737negative correlationin correlation, the two factors are going in opposite directions. EX: As the temperature goes up, hot chocolate consumption goes down.42
1379041738correlation coefficienta statistical measure of the degree of relatedness or association between two sets of data that ranges from -1 to +1. Little "r" represents. "r=.9" is a very strong positive correlation, whereas "r=.2" is a very weak positive correlation.43
1379041739experimental methodthe manipulation of an IV to understand its effect on a DV; Identifies Cause-effect44
1379041740Control ConditionThe condition of an experiment that contrasts with the experimental condition and serves as a comparison for evaluating the effect of the treatment.45
1379041741Experimental ConditionThe condition of an experiment that exposes participants to the treatment, that is, to one version of the independent variable.46
1379041742independent variablethe factor in an experiment that is manipulated by the experimenter and is given to the experimental group. It's the one thing that is different between the experimental group and the control group.47
1379041743Dependent VariableThe outcome factor; the variable may change in response to manipulations of the independent variable.48
1379041744Confounding Variableany possible variable- other than the IV - that may cause the observed effect; thus making it impossible to determine the actual cause of the change in the DV.49
1379041745Random assignmentrandom placement of subjects into experimental or control groups;50
1379041746within-group designA _____ study is an experiment where all subjects test (and respond to) all treatment combinations. _____ design is the opposite of a between-subjects design.51
1379041747between-subjects designeach participant participates in one and only one group. The results from each group are then compared to each other to examine differences, and thus, effect of the IV.52
1379041748single blindTerm used to described a study in which either the investigator or the participant, but not both of them, is unaware of the nature of the treatment the participant is receiving. Also called single-masked53
1379041749double blind studya study in which both the investigator or the participant are blind to (unaware of) the nature of the treatment the participant is receiving. Prevents expectations of researcher or participant from influencing results54
1379041750Experimenter Biasthe phenomenon in experimental science by which the outcome of an experiment tends to be biased towards a result expected by the human experimenter.55
1379041751placeboA substance containing no medication and prescribed or given to reinforce a patient's expectation to get well; An inactive substance or preparation used as a control in an experiment or test to determine the effectiveness of a medicinal drug.56
1379041752placebo effectThe beneficial effect in a patient following a particular treatment that arises from the patient's expectations concerning the treatment rather than from the treatment itself.57
1379041753meta-analysesThe process or technique of synthesizing research results by using various statistical methods to retrieve, select, and combine results from previous separate but related studies58
1379041754varianceThe square of the standard deviation. Whereas the mean is a way to describe the location of a distribution, this is a way to capture its scale or degree of being spread out.59
1379041755Standard Deviationa measure of variation (or variability) that indicates the typical distance between the scores of a distribution and the mean.60
1379041756Statistical SignificanceA statistical statement of how likely it is that an obtained result occurred by chance. Numerically, 5% or (.05) is generally considered the cutoff.61
1379041757three measures of central tendencymean, mode, and the median. These measures tend to tell us something about the "center" of a set of statistics. On a curve of normal distribution, they all fall on the same point.62
1379041758modemost frequently occurring event63
1379041759meanaverage64
1379041760medianmidpoint65
1379041761Operational DefinitionA statement of the procedures (operations) used to define research variables.66
1379041762null hypothesisa hypothesis set up to be refuted in order to support an alternative hypothesis. When used, it is presumed true until statistical evidence indicates otherwise67
1379041763list 4 ethical guidelinesconfidentiality, no lasting harm, debriefing after the study, informed consent68
1379041764biological psychologya branch of psychology concerned with the links between biology and behavior. (Some biological psychologists call themselves neuroscientists, neuropsychologists, behavior geneticists, physiological psychologists, or biopsychologists.)69
1379041765neurona nerve cell; the basic building block of the nervous system.70
1379041766soma (AKA "cell body", "cyton")the part of the neuron that contains cytoplasm and the nucleus, which directs synthesis of such substances as NTs71
1379041767dendritebranch-like structures on neurons that receive messages from the axons of other neurons and transmit them towards the cell body. Each neuron may have thousands of these structures.72
1379041768axonthe extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles or glands.73
1379041769myelin sheatha layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next.74
1379041770action potentiala neural impulse; a brief electrical charge that travels down an axon. The action potential is generated by the movement of positively charged atoms in and out of channels in the axon's membrane.75
1379041771thresholdthe level of stimulation required to trigger a neural impulse.76
1379041772synapsethe junction between the axon top of the sending neuron and the dendrite of cell body of the receiving neuron. The tiny gap at this junction is called the synaptic gap or cleft.77
1379041773neurotransmitterschemical messengers that traverse the synaptic gaps between neurons. When released by the sending neuron, they travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse.78
1379041774acetylcholine (ACh)a neurotransmitter that enables learning and memory and also triggers muscle contraction.79
1379041775endorphins"morphine within" natural, opiate-like neurotransmitters linked to pain control and to pleasure.80
1379041776Norepinephrine (AKA "noradrenaline")Involved in making us feel alert (increases heartbeat and arousal); Also involved in learning and memory retrieval; EX: NE activates your bodies emergency response (heart rate up, sweat, blood pressure up)81
1379041777SerotoninNatural tranquilizer (deep dreamless sleep, reduces hunger, makes you calm, reduces pain); Also associated with moods and emotional states: Depression; We naturally get _____ from L-Tryptophan in our diet (ex: turkey)82
1379041778GABA (gamma-aminobutyric acid)Controls anxiety; Also involved in the area of our brain that controls daily sleep and wake cycles; EX: Most sedatives or tranquilizers (Valium and Xanax) increase _____, alcohol also increases; Overdose of this shuts down breathing83
1379041779DopamineImportant for movement control, attention, learning and pleasure/rewarding sensations; a deficiency is associated with Parkinson's disease, an excess may be associated with schizophrenia84
1379041780nervesneural "cables" containing many axons. These bundled axons, which are part of the peripheral nervous system, connect the central nervous system with muscles, glands, and sense organs.85
1379041781sensory neuronsneurons that carry incoming information from the sense receptors to the central nervous system.86
1379041782motor neuronsneurons that carry outgoing information from the central nervous system to the muscles and glands.87
1379041783interneuronscentral nervous system neurons that internally communicate and intervene between the sensory inputs and motor outputs.88
1379041784neural networksinterconnected neural cells. With experience, they can learn, as feedback strengthens or inhibits connections that produce certain results.89
1379041785Nodes of Ranvierthe gaps between the myelin sheaths90
1379041786Axon Terminal ButtonsWhere neurotransmitters are started and released91
1379041787Refractory PeriodA time when the neuron is recharging and cannot fire92
1379041788Resting PotentialCharged and ready, positive outside, negative inside93
1379041789white matterParts of the nervous system that contain myelinated axons94
1379041790multiple sclerosis (MS)a disease of the central nervous system in which the myelin sheath that insulates axons is damaged or destroyed95
1379041791350,000How many people in America have MS?96
1379041792ionselectrically charged chemical particles97
1379041793resting potentialThe electrical potential across the cell membrane of a neuron in its resting state.98
1379041794-70 mV (millivolts)Resting potential of a neuron99
1379041795depolarizationA positive shift in the electrical charge in the neuron's resting potential, making it less negatively charged.100
1379041796all-or-none responsethe law that the neuron either generates an action potential when the stimulation reaches threshold or it doesn't fire when stimulation is below threshold. The strength of the action potential is constant whenever it occurs.101
1379041797Action potentials of different speeds depend on two things -"-thickness (the thicker, the quicker)-whether its covered with a myelin sheath or not"102
1379041798receptor siteA site on the receiving neuron in which neurotransmitters dock.103
1379041799excitatory effectmake an action potential more likely to occur104
1379041800inhibitory effectmakes action potential less likely to occur. May cancel out excitatory messages105
1379041801excitation thresholdlevel by which the excitatory messages exceed the inhibitory messages106
1379041802reuptakeThe process by which neurotransmitters are reabsorbed by the transmitting neuron107
1379041803enzymesOrganic substances that produce certain chemical changes in other organic substances through a catalytic action108
1379041804neuromodulatorsChemicals released in the nervous system that influence the sensitivity of the receiving neuron to neurotransmitters.109
1379041805synaptic terminals (AKA "synaptic knob")A bulb at the end of an axon in which neurotransmitter molecules are stored and released.110
1379041806synaptic vesiclesplaces were NT's are stored until release into the synapse111
1379041807selective permeabilityThe property of a membrane or other material that allows some substances to pass through it more easily than others.112
1379041808sodium-potassium pumpA mechanism of active transport that moves potassium ions into and sodium ions out of a cell.113
1379041809Agonistsdrugs that work by mimicking particular neurotransmitter (may temp. produce a high by amp norm. sensations of arousal or pleasure)114
1379041810Antagonistsdrugs that work by blocking neurotransmitters (is enough like the natural neurotransmitter to occupy its receptor site and block its effect, but not similar enough to stimulate the receptor115
1379041811afferent neuron (AKA "sensory neuron")nerve cell in our PNS that transmits impulses from receptors to the brain or spinal cord116
1379041812glial cells (glia)cells in the nervous system that support, nourish, and protect neurons.117
1379041813central nervous system (CNS)the brain and spinal cord118
1379041814peripheral nervous system (PNS)the sensory and motor neurons that connect the central nervous system (CNS) to the rest of the body.119
1379041815Autonomic Nervous System (ANS)subdivision of PNS that includes motor nerves that innervate smooth (involuntary) or heart muscle. Its sympathetic nervous system prepares the body for "fight or flight"; the PNS causes bodily changes for maintenance or rest120
1379041816somatic nervous systemthe division of the peripheral nervous system that controls the body's skeletal muscles. Also called the skeletal nervous system.121
1379041817Sympathetic Nervous Systemthe division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations.122
1379041818Parasympathetic Nervous Systemthe division of the autonomic nervous system that calms the body, conserving its energy.123
1379041819reflexa simple, automatic, inborn response to a sensory stimulus, such as the knee-jerk response.124
1379041820lesiontissue destruction. A brain _____ is a naturally or experimentally caused destruction of brain tissue.125
1379041821electroencephalogram (EEG)an amplified recording of the waves of electrical activity that sweep across the brain's surface. These waves are measured by electrodes places on the scalp.126
1379041822PET (positron emission tomography) scana visual display of brain activity that detects where a radioactive form of glucose goes while the brain performs a given task.127
1379041823MRI (magnetic resonance imaging)a technique that uses magnetic fields and radio waves to produce computer-generated images that distinguish among different types of soft tissues; allows us to see structures within the brain.128
1379041824fMRI (functional magnetic resonance imagines)a technique for revealing blood flow and, therefore, brain activity by comparing successive MRI scans. MRI scans show brain anatomy; fMRI scans show brain function.129
1379041825SQUIDSuperconducting quantum interference device- used to pinpoint location of neural activity.130
1379041826CAT scanComputerized axial tomography-Through thousands of different x-rays, it shows an image of the brain. Shows abnormalities in the structure of the brain, but can't be used to see activity.131
1379041827brainstemthe 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.132
1379041828medullathe base of the brainstem; controls heartbeat and breathing.133
1379041829reticular formationa nerve network in the brainstem that plays and important role in controlling arousal.134
1379041830thalamusthe brain's sensory switchboard, 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.135
1379041831cerebellumthe "little brain" attached to the rear of the brainstem; its functions include processing sensory input and coordinating movement output and balance.136
1379041832limbic systema doughnut-shaped system of neural structures at the border of the brainstem and cerebral hemispheres; associated with emotions such as fear and aggression and drives such as those for food and sex. Includes the hippocampus, amygdala, and the hypothalamus.137
1379041833amygdalatwo lima bean-sized neural clusters that are components of the limbic system and are linked to emotion.138
1379041834hypothalamusa 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.139
1379041835cerebral cortexthe intricate fabric of interconnected neural cells that covers the cerebral hemispheres; the body's ultimate control and information-processing center. Judgment, control, planning140
1379041836frontal lobesthe portion of the cerebral cortex lying just behind the forehead; involved in speaking and muscles movements and in making plans and judgments.141
1379041837parietal lobesthe portion of the cerebral cortex lying at the top of the head and toward the rear; receives sensory input for touch and body position.142
1379041838occipital lobesthe portion of the cerebral cortex lying at the back of the head; includes the visual areas, which receive visual information from the opposite visual field.143
1379041839temporal lobesthe portion of the cerebral cortex lying roughly above the ears; includes the auditory areas, each of which receives auditory information primarily from the opposite ear.144
1379041840motor cortexan area at the rear of the frontal lobes that controls voluntary movements.145
1379041841sensory cortexthe area at the front of the parietal lobes that registers and processes body touch and movement sensations.146
1379041842association areasareas 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.147
1379041843aphasiaimpairment of language, usually caused by left hemisphere damage either to Broca's area (impairing speaking) or to Wernicke's area (impairing understanding).148
1379041844Broca's areacontrols language expression; an area of the frontal lobe, usually in the left hemisphere, that directs the muscle movements involved in speech.149
1379041845Wernicke's areacontrols language reception; a brain area involved in language comprehension and expression; usually in the left temporal lobe.150
1379041846plasticitythe brain's capacity for modification, as evident in brain reorganization following damage (especially in children) and in experiments on the effects of experience on brain development.151
1379041847corpus callosumthe large band of neural fibers connecting the two brain hemispheres and carrying messages between them.152
1379041848split braina condition in which the two hemispheres of the brain are isolated by cutting the connecting fibers (mainly those of the corpus callosum) between them.153
1379041849PhrenologyFrans Gaul's Theory of reading bumps on the head and that the brain was in sections154
1379041850endocrine systemthe body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream.155
1379041851glandsBody organs or structures that produce secretions.156
1379041852hormonesSecretions from endocrine glands that help regulate bodily processes157
1379041853pituitary gland"An endocrine gland in the brain that produces various hormones involved in growth, regulation of the menstrual cycle, and childbirth. (AKA "master gland")158
1379041854hGRFgrowth-hormone releasing factors that stimulate the pituitary to release growth hormone (GH), which promotes physical growth159
1379041855pineal glandA small endocrine gland in the brain that produces the hormone melatonin, which is involved in regulating sleep-wake cycles160
1379041856gonadsSex glands (testes in men, ovaries in women) that produce sex hormones and germ cells (sperm in the male, egg cells in the female)161
1379041857ovariesThe female gonads, which secrete the female sex hormones estrogen and progesterone, and produce mature egg cells162
1379041858testesThe male gonads, which produce sperm and secrete the male sex hormone testosterone163
1379041859germ cellsSperm and egg cells from which new life develops164
1379041860thyroid glandAn endocrine gland in the neck that secretes the hormone throxin, which is involved in regulating metabolic functions and physical growth165
1379041861concordance ratesIn twin studies, the percentages of cases in which both members of twin pairs share the same trait or disorder166
1379041862Adrenalendocrine glands atop kidneys.167
1379041863Adrenal cortexthe outer layer of gland, produces steroid hormones such as cortisol, which is a stress hormone.168
1379041864Adrenal medullathe core of the gland; secretes adrenaline (epinephrine) and noradrenaline (norepinephrine), which prepare the body for "fight or flight," as does the sympathetic nervous system169
1379041865PancreasAn endocrine gland located near the stomach that produces the hormone insulin170
1379041866genotypean organism's genetic code171
1379041867genesBasic units of heredity that contain the individual's genetic code172
1379041868DNAthe basic chemical material in chromosomes that carries the individuals genetic code173
1379041869chromosomesrod like structures in the cell nucleus that house the individuals genes174
1379041870nature-nurture problemThe debate in psychology about the relative influences of genetics and environment in determining behavior175
1379041871phenotypeThe observable physical and behavioral characteristics of an organism representing the influences of the genotype and environment176
1379041872polygenic traitsTraits that are influenced by multiple genes interacting in complex ways177
1379041873zygotea fertilized egg cell178
1379041874insulina hormone produced by the pancreas, regulates the concentration of glucose (sugar) in the blood.179
1379041875lesion studiesexamining the psychological effects of damage to the brain; responsible for much of knowledge on cortical localization180
1379041876ablationSurgical excision or amputation of a body part or tissue.181
1379041877Absolute ThresholdThe minimum stimulation needed to detect a particular stimulus 50 percent of the time.182
1379041878Accommodation(perceptual) - The process by which the eye's lens changes shape to focus near or far objects on the retina.183
1379041879AcuityThe sharpness of vision.184
1379041880AnosmiaThe inability to smell.185
1379041881AuditionThe sense of hearing.186
1379041882Basilar MembraneRuns the length of the spiraled cochlea, holds the auditory receptors.187
1379041883Binocular CuesDepth cues, such as retinal disparity and convergence, that depend on the use of two eyes.188
1379041884Blind SpotThe point at which the optic nerve leaves the eye and does not contain receptor cells.189
1379041885Bottom-up ProcessingAnalysis that begins with the sense receptors and works up to the brain's integration of sensory information.190
1379041886CochleaA coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses.191
1379041887Cocktail Party EffectThe ability to attend selectively to only one voice among many.192
1379041888Color ConstancyPerceiving familiar objects as having consistent color, even if changing illumination alters the wavelengths reflected by the object.193
1379041889Conduction Hearing LossHearing loss caused by damage to the mechanical system that conducts sound waves to the cochlea.194
1379041890ConesReceptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. They detect fine detail and give rise to color sensations.195
1379041891ConvergenceA binocular cue for perceiving depth; the extent to which the eyes turn inward when looking at an object.196
1379041892CorneaThe curved, transparent, protective layer through which light rays enter the eye.197
1379041893Dark AdaptationThe process in which the eyes become more sensitive to light in low illumination.198
1379041894Depth PerceptionThe ability to see objects in three dimensions although the images that strike the retina are two-dimensional; allows us to judge distance.199
1379041895Difference ThresholdThe minimum difference between two stimuli required for detection 50 percent of the time. (Also called just noticeable difference or jnd.)200
1379041896EardrumThe thin, semitransparent, oval-shaped membrane that separates the middle ear from the external ear.201
1379041897Extrasensory Perception(ESP) - The controversial claim that perception can occur apart from sensory input. Said to include telepathy, clairvoyance, and precognition.202
1379041898FarsightednessA condition in which faraway objects are seen more clearly than near objects because the image of near objects is focused behind the retina.203
1379041899Feature DetectorsNerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement.204
1379041900Figure-groundThe organization of the visual field into objects that stand out from their surroundings.205
1379041901FoveaThe central focal point in the retina, around which the eye's cones cluster.206
1379041902FrequencyThe number of complete wavelengths that pass a point in a given time (for example, per second).207
1379041903Frequency TheoryIn 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.208
1379041904Gate-control TheoryThe theory that the spinal cord contains a neurological "gate" that blocks pain signals or allows them to pass on to the brain.209
1379041905GestaltAn organized whole. Emphasizes our tendency to integrate pieces of information into meaningful wholes.210
1379041906GroupingThe perceptual tendency to organize stimuli into coherent groups.211
1379041907HabituationDecreasing responsiveness with repeated stimulation.212
1379041908HueThe dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth.213
1379041909Human Factors PsychologyA branch of psychology that explores how people and machines interact and how machines and physical environments can be adapted to human behaviors.214
1379041910Inner EarThe innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs.215
1379041911IntensityThe amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave's amplitude.216
1379041912IrisA ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.217
1379041913KinesthesisThe system for sensing the position and movement of individual body parts.218
1379041914LensThe transparent structure behind the pupil that changes shape to help focus images on the retina.219
1379041915Middle EarThe chamber between the eardrum and cochlea containing three tiny bones (hammer, anvil, stirrup) that concentrate the vibrations of the eardrum on the cochlea's oval window.220
1379041916Monocular CuesDistance cues, such as linear perspective and overlap, available to either eye alone.221
1379041917Motion Parallax(relative motion) - Monocular cue for depth that involves images of objects at different distances moving across the retina at different rates.222
1379041918NearsightednessA condition in which nearby objects are seen more clearly than distant objects because distant objects focus in front of the retina.223
1379041919OlfactionThe sense of smell.224
1379041920Opponent-process Theory(color) - The theory that opposing retinal processes (red-green, yellow-blue, 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.225
1379041921Optic NerveThe nerve that carries neural impulses from the eye to the brain.226
1379041922Parallel ProcessingThe processing of several aspects of a problem simultaneously; the brain's natural mode of information processing for many functions, including vision.227
1379041923PerceptionThe process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events.228
1379041924Perceptual AdaptationIn vision, the ability to adjust to an artificially displaced or even inverted visual field.229
1379041925Perceptual ConstancyPerceiving objects as unchanging (having consistent lightness, color, shape, and size) even as illumination and retinal images change.230
1379041926Perceptual SetA mental predisposition to perceive one thing and not another.231
1379041927PheromonesChemicals released by one animal and detected by another that shape the second animal's behavior or physiology.232
1379041928Phi PhenomenonAn illusion of movement created when two or more adjacent lights blink on and off in succession.233
1379041929PitchA tone's highness or lowness; depends on frequency.234
1379041930Place TheoryIn hearing, the theory that links the pitch we hear with the place where the cochlea's membrane is stimulated.235
1379041931PsychophysicsThe study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experience of them.236
1379041932PupilThe adjustable opening in the center of the eye through which light enters.237
1379041933RetinaThe light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.238
1379041934Retinal DisparityA binocular cue for perceiving depth: By comparing images from the two eyeballs, the brain computes distance - the greater the difference between the two images, the closer the object.239
1379041935RodsRetinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond.240
1379041936Selective AttentionThe focusing of conscious awareness on a particular stimulus, as in the cocktail party effect.241
1379041937SensationThe process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.242
1379041938Sensorineural Hearing LossHearing loss caused by damage to the cochlea's receptor cells or to the auditory nerves; also called nerve deafness.243
1379041939Sensory AdaptationDiminished sensitivity as a consequence of constant stimulation.244
1379041940Sensory InteractionThe principle that one sense may influence another, as when the smell of food influences its taste.245
1379041941Shape ConstancyRefers to our perceiving an object as retaining its shape even when the shape it casts on the retina changes.246
1379041942Signal Detection TheoryA theory predicting how and when we detect the presence of a faint stimulus amid background stimulation. Assumes that there is no single absolute threshold and that detection depends partly on a person's experience, expectations, motivation, and level of fatigue.247
1379041943Size ConstancyThe perception that an object remains the same size despite changes in the size of the proximal stimulus on the retina.248
1379041944Stroboscopic MotionAn illusion in which images flashed in rapid succession are perceived as moving.249

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