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Final Exam Terms
All of the terminology that could be on the final exam for Intro to Psychology
281
Psychology
Undergraduate 1
12/14/2010

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Term
psychology
Definition
the scientific study of behavior and mental processes
Term
amygdala
Definition
part of the brain that determines whether an event is emotionally significant
Term
(testable) hypothesis
Definition
a specific claim about the facts, framed in a way that will allow an unambiguous test and can be proven wrong
Term
dependent variable
Definition
variable that is measured or recorded in an experiment
Term
independent variable
Definition
variable that the experimenter manipulates as a basis for making predictions about the other variable
Term
population
Definition
all members of a given group about which the investigator wants to draw conclusions
Term
sample
Definition
a subset of the population that the investigator uses to draw conclusions about the whole population
Term
random sampling
Definition
a procedure in which every member of the population has an equal chance of being picked to participate in a study
Term
case study
Definition
an intensive study of one person
Term
external validity
Definition
the degree to which a study's participants, stimuli, and procedures adequately reflect the world as it actually is
Term
demand characteristics
Definition
the cues in a study that might tell a research participant what behaviors are expected or desirable in that setting
Term
double-blind design
Definition
the technique of assigning participants to experimental conditions while keeping both the participants and the researchers unaware of who is assigned to which group
Term
descriptive statistics
Definition
mathematical procedures that allow a researcher to characterize a data pattern - includes measures of central tendency and variability
Term
inferential statistics
Definition
mathematical procedures that allow a researcher to draw further claims from a data pattern, including claims about whether the pattern observed in the sample is likely to be observed elsewhere
Term
variability
Definition
the degree to which scores in a frequency distribution depart from the central value
Term
standard deviation
Definition
the square root of variance
Term
correlation
Definition
the tendency of two variables to change together
Term
correlation coefficient
Definition
value between -1 and 1 which indicates strength of a correlation
Term
reliability
Definition
the degree of consistency with which a test measures a trait or attribute
Term
validity
Definition
the extent to which a method or procedure measures what it is supposed to measure
Term
effect size
Definition
the magnitude of the difference between groups in a study, often computed by subtracting the mean of one group's scores from the mean of the other's scores
Term
statistical significance
Definition
a calculation central to inferential statistics that describes the likelihood that the results of a study happened by chance
Term
quasi-experiment
Definition
a comparison that relies on already-existing groups
Term
correlational studies
Definition
studies in which the investigator analyzes the relationships among variables that were in place before the study, without manipulating those variables
Term
third-variable problem
Definition
the possibility that in an observational study, something unconsidered is causing the change
Term
experiment
Definition
a study of causal relationships in which the researcher manipulates an independent variable to examine its effect on a dependent variable
Term
experimental manipulation
Definition
the deliberate alteration of the independent variable in an experiment in order to learn about its effects on the dependent variable
Term
random assignment
Definition
in an experimental design, the random placement of participants in either the experimental or control groups, ensuring that the groups are matched at the outset of the experiment
Term
within-subject comparisons
Definition
within a study, comparing data about each participant in one situation to data about the same participant in another situation
Term
between-subject comparison
Definition
within a study, comparing one group of individuals to a different group
Term
internal validity
Definition
the characteristic of a study that allows us to conclude that the manipulation of the independent variable caused the observed changes in the dependent variable
Term
peer review
Definition
the process in which the conclusion reached by an experiment is tested by other scientists to see if they reach the same conclusion
Term
replication
Definition
a repetition of an experiment that yields the same results
Term
meta-analysis
Definition
a statistical technique for combining the results of many studies on a particular topic, even when the studies used different data collection methods
Term
informed consent
Definition
a research participant's agreement to take part in the study, based on full information about what the experiment will involve
Term
debriefing
Definition
a step at the end of an experiment in which the researcher explains the study's purpose and design to each participant and undoes any manipulations to participants' beliefs or states.
Term
chromosomes
Definition
structures in the nucleus of each cell that contain the genes, the units of hereditary transmission. A human cell has 46 __________ arranged in 23 pairs.
Term
DNA (deoxyribonucleic acid)
Definition
the complex molecule that is the constituent of genes
Term
gene
Definition
a section of a DNA molecule that contains instructions for how and when to assemble a protein. _____ are located on chromosomes
Term
gene expression
Definition
every cell contains a copy of the same 46 chromosomes but are capable of different tasks because within each cell, the genes are not active all the time
Term
genotype
Definition
the complete set of an organism's genes
Term
phenotype
Definition
the overt characteristics and behaviors of an organism
Term
allele
Definition
an alternative form of a specific gene
Term
dominant
Definition
a term for a gene that directs the development of a particular characteristic even when the corresponding gene on the other chromosome is different -- i.e., some other allele
Term
recessive
Definition
a term for a gene that directs the development of a particular characteristic only if the corresponding gene on the other chromosome matches it -- i.e., is the same allele
Term
codominant
Definition
a relationship in which both genes in the pair effect the phenotype (blood type - if a person inherits allele for blood type A from one parent and B from the other, the person will end up with blood type AB)
Term
polygenic inheritance
Definition
a pattern in which many genes all influence a single trait
Term
proximate cause
Definition
the influences within an organism's lifetime that led to its particular traits or behaviors
Term
ultimate cause
Definition
the reasons why, over many years of evolution, a particular trait or behavior helped members of a population to survive and reproduce
Term
natural selection
Definition
the mechanism that drives biological evolution
Term
naturalistic fallacy
Definition
the mistaken notion that anything "natural" in natural selection must be "good"
Term
mutations
Definition
errors in the replication of DNA
Term
niche construction
Definition
the process in which organisms, through their own behaviors, alter the environment and create their own circumstances
Term
species specific
Definition
pertaining to just one species
Term
species general
Definition
pertaining to all organisms in a species
Term
dizygotic
Definition
twins that develop from two different eggs that are simultaneous fertilized by two sperm
Term
monozygotic
Definition
twins that develop from a single fertilized egg that then splits in half - twins will be genetically identical
Term
heritability ratio
Definition
the proportion of the variance of a trait that is due to genetic differences
Term
environment of evolutionary adaptiveness
Definition
the environment that was in place when a trait was evolving
Term
monogamy
Definition
a mating pattern in which one male and one female form an enduring reproductive partnership
Term
polygamy
Definition
a mating system in which a member of one sex mates with several members of the opposite sex
Term
neuroscience
Definition
multidisciplinary effort that seeks to understand the nature, function and origins of the nervous system
Term
neurons
Definition
specialized cell in the nervous system that accumulates and transmits information
Term
nerve impulse
Definition
the means through which individual neurons communicate with each other
Term
dendrite
Definition
branched part of a neuron that receives impulses and conducts them toward the cell body
Term
cell body
Definition
the portion of the neuron containing the metabolic machinery that keeps the cell alive and functional; also contains nucleus of neuron
Term
axon
Definition
the part of a neuron that transmits impulses to glands, muscles, or other neurons
Term
efferent neurons
Definition
nerves that carry messages outward from the central nervous system
Term
afferent neurons
Definition
nerves that carry messages inward toward the central nervous system
Term
interneurons
Definition
neurons that are neither afferent nor efferent, but instead carry information from one neuron to another
Term
glia
Definition
a type of cell in the nervous system long believed to provide a "support" function for neurons; recent research indicates that these cells provide other functions as well
Term
white matter
Definition
myelinated axons traversing long distances either within the brain or to and from the body
Term
gray matter
Definition
cell bodies, dendrites, and unmyelinated axons
Term
action potential
Definition
a brief change in the electrical charge of a neuronal membrane; the physical basis of the signal that travels the length of the neuron - sodium flows out and potassium flows in
Term
resting potential
Definition
the voltage difference between the inside and outside of a neuronal membrane when the neuron is not firing
Term
excitation threshold
Definition
the voltage difference between a neuron's interior and exterior that, if exceeded, causes the neuron to fire; about -55 millivolts
Term
refractory period
Definition
time after an action potential during which the cell membrane is unprepared for the next action potential
Term
propagation of the action potential
Definition
action potentials trigger, which leads to more action potentials triggering, which allows depolarization to move down the neuron
Term
all-or-none law
Definition
a neuron will fire regardless of whether the stimulus just meets the threshold or greatly exceeds it
Term
synapse
Definition
the small gap between two adjacent neurons, consisting of the presynaptic and postsynaptic neurons' membranes the space between them
Term
presynaptic neuron
Definition
cell that sends the message
Term
neurotransmitters
Definition
chemicals released by one neuron which trigger a response in another neuron; the chief means of communication among neurons
Term
synaptic reuptake
Definition
the presynaptic neuron's process of reabsorbing its own neurotransmitters after signaling so that they can be released again the next time the neuron fires
Term
lock-and-key model
Definition
transmitter molecules will affect the postsynaptic neuron only if it has exactly the right shape to fit in the receptor molecule
Term
agonists
Definition
drugs that enhance a neurotransmitter's activity
Term
antagonists
Definition
drugs that impede the activity of a neurotransmitter
Term
endogenous substances
Definition
substances produced naturally within the body that provide a way for the nervous system to control its own functioning
Term
exogenous substances
Definition
chemicals introduced from outside the body
Term
blood-brain barrier
Definition
specialized membranes that surround the blood vessels within the brain and filter harmful chemicals out of the brain's blood supply
Term
endocrine system
Definition
system of glands that release secretions directly into the bloodstream and affect organs elsewhere in the body
Term
hormone
Definition
chemical released by a gland; travel through the bloodstream and influence functions such as metabolic rate, arousal level, and liver's sugar output
Term
single-cell recording
Definition
monitoring individual neurons;
Term
multi-unit recording
Definition
using microelectrodes to record the activity of multiple individual cells, with computer analyses determining patterns across the cells
Term
neuropsychology
Definition
the effort to gain insights into the brain's function by closely examining individuals who have suffered some form of brain damage
Term
aphasia
Definition
disruption of language use caused by brain damage
Term
transcranial magnetic stimulation
Definition
the technique of applying repeated magnetic stimulation at the surface of the skull to temporarily stimulate or disable a target brain region
Term
electroencephalogram
Definition
a record of the brain's electrical activity by placing electrodes on the scalp
Term
event-related potential
Definition
electrical changes in the brain that correspond to the brain's response to a specific event; measured with an EEG
Term
CAT scan
Definition
a technique for examining brain structure by constructing a composite of X-ray images taken from many angles
Term
MRI (magnetic resonance imaging)
Definition
a neuroimaging technique that documents the effects of strong magnetic pulses on the molecules that make up brain tissues
Term
PET scan
Definition
a technique for examining brain function by observing the amount of metabolic activity in different brain regions
Term
fMRI scanning
Definition
a technique for examining brain function by measuring blood flow and oxygen use within the brain
Term
central nervous system
Definition
brain and spinal cord
Term
peripheral nervous system
Definition
afferent and efferent nerves that extend from the brain and spinal cord to connect them with the organs and muscles. Virtually all of the nerves in the ______ connect to the CNS via the spinal cord
Term
somatic nervous system
Definition
the division of the peripheral nervous system that controls the skeletal muscles and transmits sensory information
Term
autonomic nervous system
Definition
division of the peripheral nervous system that receives information from and controls the internal organs
Term
sympathetic branch
Definition
division of the autonomic nervous system that mobilizes the organism for physical exertion
Term
parasympathetic branch
Definition
division of the autonomic nervous system that restores the body's normal resting state and conserves energy
Term
brain stem
Definition
brain region at the top of the spinal cord that includes the medulla and the pons
Term
medulla
Definition
bottom of brain stem - controls breathing and blood circulation
Term
pons
Definition
controls attentiveness and helps govern the timing of sleep
Term
cerebellum
Definition
part of the brain that controls muscular coordination and equilibrium
Term
forebrain
Definition
largest part of the brain
Term
cerebral cortex
Definition
outermost lay of the forebrain
Term
longitudinal fissure
Definition
deepest groove in brain; divides brain into left and right cerebral hemispheres
Term
cerebral hemisphere
Definition
one half of the cerebrum
Term
frontal lobe
Definition
area at the front of each cerebral hemisphere - includes tissue crucial for many aspects of planning and controlling thoughts and behavior
Term
parietal lobe
Definition
the area in each cerebral hemisphere that lies between the frontal and occipital lobes; includes tissue crucial for receiving information from the skin senses
Term
temporal lobe
Definition
the area in each cerebral hemisphere lying below the temples; includes tissue crucial for hearing and many aspects of language use
Term
occipital lobe
Definition
the rearmost area of each cerebral hemisphere; includes tissue crucial for processing visual information
Term
hypothalamus
Definition
a subcortical structure that plays a vital role in controlling many motivated behaviors, like eating, drinking, and sexual activity
Term
limbic system
Definition
a group of interconnected structures that are crucial for emotion, motivation, and many aspects of learning and memory
Term
hippocampus
Definition
a temporal lobe structure that plays a pivotal role in learning and forming new memories
Term
lateralization
Definition
functional differences between the two cerebral hemispheres
Term
commissures
Definition
thick bundles of fibers that carry information back and forth between the two hemispheres
Term
left hemisphere
Definition
language skills and inferences - which hemisphere?
Term
right hemisphere
Definition
ability to recognize faces and patterns - which hemisphere?
Term
sensory areas
Definition
receive and interpret information from sense organs
Term
motor areas
Definition
control behaviors and movements
Term
association areas
Definition
areas of the brain involved in "thinking"
Term
contralateral control
Definition
the typical pattern in vertebrates in which movements of the right side of the body are controlled by the left hemisphere, while movements of the left side are controlled by the right hemisphere
Term
primary somatosensory projection area
Definition
initial receiving area for sensory information arriving from their skin senses
Term
apraxia
Definition
a serious disturbance in beginning or carrying out voluntary movements
Term
visual agnosia
Definition
inability to recognize a visual stimulus despite the ability to see and describe it
Term
prosopagnosia
Definition
damage to both temporal and parietal lobes leads to trouble recognizing faces, even very familiar faces or reflections of one's own face
Term
neglect syndrome
Definition
the result of certain right parietal lobe lesions that leave a patient completely inattentive to stimuli to her left, including the left side of her own body
Term
aphasia
Definition
any of a number of linguistic disorders caused by injury to or malformation of the brain
Term
nonfluent aphasia or Broca's aphasia
Definition
nonfluent aphasia
Term
fluent aphasia or Wernicke's aphasia
Definition
aphasia of speech comprehension
Term
prefrontal area
Definition
the frontmost portion of the frontal lobes, involved in working memory, strategy information, and response inhibition
Term
executive control
Definition
processes such as making plans or overriding habitual responses that let the brain direct its own cognitive activities
Term
perseveration
Definition
the tendency to repeat a response inappropriately
Term
brain plasticity
Definition
the capacity for the brain to alter its structure and function
Term
neurogenesis
Definition
birth of new neurons
Term
distal stimulus
Definition
an object or event in the outside world
Term
proximal stimulus
Definition
the energies from the outside world that directly reach our sense organs
Term
psychophysics
Definition
an approach to perception that relates the characteristics of physical stimuli to the sensory experiences they produce
Term
absolute threshold
Definition
the smallest quantity of a stimulus that an individual can detect
Term
difference threshold
Definition
also known as the JND, the smallest amount that a given stimulus must be increased or decreased so that an individual can notice the difference
Term
Weber's law
Definition
the observation that the size of the difference threshold is proportional to the intensity of the standard stimulus
Term
Fechner's law
Definition
the observation that the strength of a sensation is proportional to the logarithm of physical stimulus intensity
Term
perceptual sensitivity
Definition
an organism's ability to detect a signal
Term
decision criteria
Definition
an organism's rule for how much evidence it needs before responding
Term
signal detection theory
Definition
the theory that perceiving or not perceiving a stimulus is actually a judgment about whether a momentary sensory experience is due to background noise alone or background noise plus a signal
Term
transduction
Definition
the process through which a physical stimulus is converted into a signal within the nervous system
Term
sensory coding
Definition
the process through which the nervous system represents the qualities of the incoming stimulus
Term
psychological intensity
Definition
the difference between a bright light and a dim one, or a subtle scent of cinnamon in contrast to a dense cloud of the smell
Term
sensory quality
Definition
how the nervous system represents the difference between, say, vision and hearing; can also be how it represents the difference between a high-pitched note and a low one, etc.
Term
specificity theory
Definition
the proposal that different sensory qualities are signaled by different quality-specific neurons
Term
pattern theory
Definition
the proposal that different sensory qualities are encoded by specific patterns of firing among the relevant neurons
Term
sensory adaptation
Definition
the process by which the sensitivity to a stimulus declines if the stimulus is presented for an extended period of time
Term
kinesthesis
Definition
sensations generated by receptors in the muscles, tendons, and joints that inform us of our skeletal movement
Term
vestibular sense
Definition
sensations generated in the semicircular canals of the inner ear that inform us about the head's orientation and movements
Term
skin senses
Definition
group of senses, including pressure, warmth, cld, and pain, through which we gain information about our immediate surroundings
Term
nociceptors
Definition
receptors in the skin that give rise to the sense of pain; they respond to various forms of tissue damage and to temperature extremes
Term
a-delta fibers
Definition
allow rapid transmission of information and are responsible for the pain you experience when you're first injured
Term
c fibers
Definition
unmyelinated, which leads to slower transmission; source of dull aching pain
Term
gate control theory
Definition
the proposal that pain sensations must pass through a neural "gate" in order to reach the brain and can be blocked at that gate by neurons that inhibit signals from nociceptors
Term
olfactory epithelium
Definition
a mucous membrane at the top of the nasal cavity; contains the olfactory receptor neurons that respond to airborne molecules called odorants
Term
glomeruli
Definition
sites in the brain's olfactory bulb where signals from the smell receptors converge
Term
pheromones
Definition
biologically produced odorants that convey information to other members of the species
Term
papillae
Definition
structures on the tongue that contain the taste buds, which in turn contain taste receptors
Term
supertasters
Definition
people with more papillae than other people
Term
sound waves
Definition
successive pressure variations in the air that vary in amplitude and wavelength
Term
sine wave
Definition
a wave that corresponds exactly to the plot of the trigonometric sine function
Term
amplitude
Definition
the height of a wave crest, used (in the case of sound waves) as a measure of sound intensity
Term
wavelength
Definition
measurement of the distance between one crest and next
Term
period
Definition
measurement of time between one crest and next
Term
frequency
Definition
the number of wave peaks per second; governs the perceived pitch of the sound
Term
decibels
Definition
measurement of sound intensity
Term
hertz
Definition
measurement of frequency of a sound wave; cycles per second
Term
cochlea
Definition
the coiled structure in the inner ear that contains the basilar membrane
Term
eardrum
Definition
the taut membrane that transmits the vibrations caused by sound waves from the auditory canal to the ossicles in the middle ear
Term
oval window
Definition
the membrane separating the middle ear from the inner ear
Term
auditory ossicles
Definition
the three bones of the middle ear that transmit the vibrations of the eardrum to the oval window
Term
basilar membrane
Definition
a membrane running the length of the cochlea - sound waves cause a deformation of this membrane
Term
hair cells
Definition
auditory receptors in the cochlea and thus stimulating the auditory receptors
Term
place theory
Definition
a proposal about pitch perception stating that regions of the basilar membrane and other membranes above
Term
timbre
Definition
the quality of a sound apart from its pitch or loudness
Term
localization
Definition
ability to determine where a sound is coming from
Term
preferred pitch
Definition
a frequency of sound to which a certain neuron will respond more vigorously than it will to any other frequency
Term
tonotopic map
Definition
a map organized on the basis of tone
Term
photoreceptors
Definition
a light-sensitive cell located on the retina that converts light energy into neural impulses
Term
retinal image
Definition
the image of an object that is projected on the retina
Term
iris
Definition
smooth, circular muscle surrounding the papillary opening
Term
rods
Definition
photoreceptors in the retina that respond to lower light intensities and give rise to achromatic sensations
Term
cones
Definition
visual receptors that respond to greater light intensities and give rise to chromatic sensations
Term
fovea
Definition
area roughly at retina's center where cones are plentiful and visual acuity is greatest
Term
optic nerve
Definition
the bundle of fibers that proceeds from each retina to the brain
Term
blind spot
Definition
region where axons of ganglion cells exit; no photoreceptors
Term
photopigment
Definition
a chemical in the photoreceptors that changes its form in response to light, producing an electrical change that signals to the nervous system that light is present
Term
brightness contrast
Definition
effect that makes a stimulus look much brighter on a dark background than on a bright one
Term
edge enhancement
Definition
amplification of brightness boundaries by the visual system
Term
lateral inhibition
Definition
the pattern of interaction among neurons in the visual system in which activity in one neuron inhibits adjacent neurons sideways
Term
hue
Definition
the attribute that distinguishes blue from green from red; also the attribute shared by various shades of the same color
Term
brightness
Definition
the dimension of color that differentiates black from white and distinguishes the grays in between
Term
saturation
Definition
the "purity" of a color
Term
Young-Helmholtz theory
Definition
human color vision is trichromatic - based on three elements, each tied to one type of cone
Term
simultaneous color contrast
Definition
the tendency of any chromatic region in the visual field to induce a complementary color in adjoining areas
Term
opponent-process theory
Definition
a theory of color vision that proposes three pairs of color antagonists: red-green, blue-yellow, black-white
Term
receptive field
Definition
for a particular cell in the visual system, the pattern of retinal stimulation that most effectively causes the cell to fire
Term
feature detectors
Definition
neurons in the retina or brain that respond to specific attributes of the stimulus, such as movement, orientation, and so on
Term
Gestalt psychology
Definition
a theoretical approach that emphasizes the role of organized wholes in perception and other psychological processes
Term
similarity
Definition
a principle by which we tend to group like figures, especially by color and orientation
Term
proximity
Definition
in perception, the closeness of two figures
Term
good continuation
Definition
a factor in visual grouping; we tend to perceive contours in a way that alters their direction as little as possible
Term
subjective contours
Definition
perceived contours that do not exist physically - we tend to complete figures that have gaps in them by perceiving a contour as continuing along its original path
Term
reversible figure
Definition
a visual pattern that easily allows for more than one interpretation
Term
visual search
Definition
a task in which participants are asked to determine whether a specified target is present within a field of stimuli
Term
feature net
Definition
a model of pattern recognition involving a network of detectors and having feature detectors as the networks starting point
Term
geons
Definition
simple geometric figures, such as cubes, cylinders, and pyramids, that can be combined to form all other shapes
Term
parvo cells
Definition
cells that are particularly suited to perceiving color and form
Term
magno cells
Definition
cells that are particularly suited to motion and depth
Term
parallel processing
Definition
cells analyzing the forms do their work at the same time that other cells are analyzing the motion and still others the colors
Term
"What" system
Definition
the visual pathway leading from the visual cortex to the temporal lobe
Term
"where" system
Definition
the visual pathway leading from the visual cortex to the parietal lobe
Term
binding problem
Definition
problem confronted by the brain of recombining the elements of a stimulus, given the fact that these elements are initially analyzed separately by different neural systems
Term
neural synchrony
Definition
different groups of neurons firing in synchrony with each other to identify which sensory elements belong together
Term
perceptual constancy
Definition
the accurate perception of certain attributes of a distal object, such as its shape, size, and brightness, despite changes in the proximal stimulus caused by variations in our viewing circumstances
Term
size constancy
Definition
correctly perceiving the sizes of objects in the world despite the changes in retinal image size created by changes in viewing distance
Term
shape constancy
Definition
we correctly perceive the shapes of objects despite changes in the retinal image created by shifts in our viewing angle
Term
brightness constancy
Definition
correctly perceive the brightness of objects where they're illuminated by dim light or strong sun
Term
depth cues
Definition
sources of information that signal the distance from the observer to the distal stimulus
Term
binocular disparity
Definition
a depth cue based on the differences between the two eyes' views of the world.
Term
monocular depth cue
Definition
features of the visual stimulus that indicate distance even if the stimulus is viewed with only one eye
Term
pictorial cues
Definition
patterns that can be represented on a flat surface in order to create a sense of a three-dimensional object or scene
Term
interposition
Definition
a monocular cue to distance that relies on the fact that objects farther away are blocked from view by a closer object
Term
linear perspective
Definition
a cue for distance based on the fact that parallel lines seem to converge as they get farther away from the viewer
Term
motion parallax
Definition
a depth cue based on the fact that, as an observer moves, the retinal images of nearby objects move more rapidly than do the retinal images of objects farther away
Term
optic flow
Definition
change in our visual field as we move toward an object
Term
motion detectors
Definition
cells in the visual cortex that are sensitive to an image moving in a particular direction across the retina
Term
apparent movement
Definition
the perception of movement produced by stimuli that are stationary but are presented first at one position and then, at an appropriate time interval, presented at a different position
Term
induced motion
Definition
perceived movement of a stationary stimulus, usually caused by movement of a surrounding framework or nearby objects
Term
correspondence problem
Definition
as your view changes, the perceptual task of determining which aspects of the current view correspond to which aspects of the view seen a moment ago
Term
conjunction search
Definition
a search in which a target is defined by a combination of features
Term
illusory conjunction
Definition
a pattern of errors in which observers correctly perceive the features present in a display, such as color and shape, but misperceive how they were combined
Term
priming
Definition
the process through which a detector or portion of the nervous system is prepared for an upcoming input, making it easier for the participant to recognize that input
Term
data-driven priming
Definition
once you see a stimulus, you'll perceive it more efficiently the next time you see it
Term
expectations-based priming
Definition
if you think you're going to see the word CAT, you will prime the appropriate detectors; however, if you guessed incorrectly, you will be less prepared to see the word that does come up
Term
habituation
Definition
a decline in the response to a stimulus once the stimulus has become familiar; don't notice airplanes constantly flying over Georgetown once you've been there for more than two weeks
Term
dishabituation
Definition
an increase in response to a stimulus caused by a change in something familiar
Term
unconditioned response
Definition
a response elicited by an unconditioned stimulus without prior training
Term
unconditioned stimulus
Definition
a stimulus that reliably triggers a particular response without prior training
Term
conditioned response
Definition
a response elicited by an initially neutral stimulus
Term
conditioned stimulus
Definition
an initially neutral stimulus that comes to elicit a new response due to pairings with the unconditioned stimulus
Term
classical conditioning
Definition
a form of learning in which one stimulus is paired with another so that the organism learns a relationship between the stimuli
Term
second-order conditioning
Definition
a form of learning in which a neutral stimulus is first made meaningful through classical conditioning. Then, that stimulus is paired with a new, neutral stimulus until the new stimulus also elicits the conditioned response
Term
extinction
Definition
the weakening of a learned response that is produced if a conditioned stimulus is now repeatedly present without the unconditioned stimulus
Term
spontaneous recovery
Definition
the reappearance of an extinguished response after a period in which no further conditioning trials have been presented
Term
exposure therapy
Definition
exposing someone to something they are afraid of multiple times in a comfortable setting to help them get over their fear
Term
stimulus generalization
Definition
the tendency for stimuli similar to those used during learning to elicit a reaction similar to the learned response
Term
generalization gradient
Definition
greater the difference between new stimulus and original CS, weaker the CR will be
Term
discrimination
Definition
an aspect of learning in which the organism learns to respond differently to stimuli that have been associated with a US (or reinforcement), and stimuli that have not
Term
inhibitor
Definition
a stimulus signaling that an event is not coming, which elicits a response opposite to the one that the event usually elicits
Term
contiguity
Definition
CS and US arrive close to each other in time
Term
contingency
Definition
CS provides information about the arrival of the US
Term
blocking effect
Definition
a result showing that an animal learns nothing about a stimulus if the stimulus provides no new information
Term
compensatory response
Definition
a response that offsets the effects of the upcoming unconditioned stimulus
Term
instrumental/operant conditioning
Definition
a form of learning in which the participant receives a reinforcer only after performing the desired response, and thereby learns a relationship between the response and the reinforcer
Term
law of effect
Definition
Thorndike's theory that a response followed by a reward will be strengthened, whereas a response followed by no reward will be weakened
Term
operant
Definition
in Skinner's system, an instrumental response that is defined by its effect on the environment
Term
reinforcer
Definition
a stimulus delivered after a response that makes the response more likely
Term
discriminative stimuli
Definition
external events that signal for an animal what sorts of behaviors will be rewarded in a given situation
Term
shaping
Definition
the process of eliciting a desired response by rewarding behaviors that are increasingly similar to that response
Term
primary reinforcer
Definition
food, water, escape from the scent of a predator, and so on
Term
conditioned reinforcer
Definition
a reinforcer that has repeatedly been paired with some other, already established reinforcer
Term
behavioral contrast
Definition
a response pattern in which an organism evaluates a reward relative to other available rewards or those that have been available recently
Term
partial reinforcement
Definition
a learning condition in which only some of the organism's responses are reinforced
Term
schedule of reinforcement
Definition
the rules about how often and under what conditions a response will be reinforced
Term
ratio schedule
Definition
a pattern of delivering reinforcements only after a certain number of responses
Term
interval schedule
Definition
a pattern of delivering reinforcements only after a certain amount of time has passed
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