AP Psychology big exam Flashcards
psychology
the scientific study of behavior and mental processes
functionalism
an early school of psychology countering structuralism that focused on how our minds and behaviors enable us to adapt, survive, and flourish
behaviorism
the view that psychology should be an objective science that studies behavior without reference to mental processes
Wilhelm Wundt
a German who established the first psychological laboratory in 1879
Structuralism
an early school of psychology that used introspection to explore the structural elements of the human mind
Evolutionary psychology
the study of the evolution of behavior and the mind, using principles of natural selection
Gestalt psychology
a psychological approach that emphasizes that we often perceive the whole rather than the sum of the parts
William James
an American psychologist who founded functionalism
Introspection
the process of looking inward in an attempt to directly observe one’s own psychological processes
Natural selection
Charles Darwin’s principle that traits contributing to reproduction and survival will most likely be passed on to succeeding generations
cognitive psychology
the scientific study of mental processes, including perception, thought, memory, and reasoning
Mary Whiton Calkins
the first woman president of the APA (American Psychological Association)
Case study
a research method in which one individual or group is studied in depth in the hope of revealing universal principles
positive correlation
as one variable increases or decreases, so does the other in the same direction (e.g. practice and performance)
scatterplot
a graphed cluster of dots, each of which represents the values of two variables. The amount of scatter suggests the strength of the correlation.
independent variable
in an experiment, the variable whose effect is being studied. It is what is controlled by the experimenter.
naturalistic observation
observing and recording behavior in naturally occurring situations without trying to manipulate and control the situation
negative correlation
as one variable increases, the other decreases (e.g. stress and health)
experimental group
in an experiment, the group exposed to the independent variable
dependent variable
in an experiment, the outcome that is measured; the variable that may change in response to the independent variable
survey
a technique for obtaining the self-reported attitudes or behaviors of a particular group, usually by questioning a random sample of the group
correlation coefficient
a statistical index of the relationship between two things (from -1.00 to +1.00)
control group
in an experiment, the group not exposed to the independent variable that serves as a comparison for evaluating the effect of the treatment
random sample
a sample that fairly represents a population because each member has an equal chance of inclusion
random assignment
assigning participants to experimental and control groups by chance, thus minimizing preexisting differences between the different groups
placebo effect
a “fake” pill that has no therapeutic effect, used as a control in testing new drugs
mean
the arithmetic average of a distribution, obtained by adding the scores and then dividing by the number of scores
range
the difference between the highest and lowest scores in a distribution
operational definition
a statement of the exact procedures (or operations) used in a research study
informed consent
giving potential participants enough information about a study to enable them to choose whether they wish to participate
median
the middle score in a distribution; half the scores are above it and half are below it
standard deviation
a computed measure of how much scores vary around the mean score
replication
repeating the essence of a research study to see whether the basic finding can be reproduced
debriefing
the post-experimental explanation of a study, including its purpose and any deceptions, to its participants
mode
the most frequently occurring score(s) in a distribution
normal distribution
a bell-shaped curve, describing the spread of a characteristic throughout a population.
sensation
the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment
signal detection theory
a theory that assumes there is no single absolute threshold and that detection depends partly on a person’s experience, expectations, motivation, and alertness
top-down processing
information processing guided by higher-level mental processes, as when we construct perceptions drawing on our experience and expectations
pupil
the adjustable opening in the center of the eye through which light enters
perception
the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events
difference threshold
the minimum difference between two stimuli required for detection; sometimes called the just noticeable difference (j.n.d.)
bottom-up processing
analysis that begins with the sensory receptors and works up to the brain’s integration of sensory information
lens
the transparent structure behind the pupil that changes shape to help focus images on the retina
absolute threshold
the minimum stimulus energy needed to detect a particular stimulus 50 percent of the time
Weber’s law
the principle that, to be perceived as different, two stimuli must differ by a constant percentage (rather than a constant amount)
sensory adaptation
diminished sensitivity as a consequence of constant stimulation (e.g. getting used to the temperature of a pool)
accommodation
the process by which the eye’s lens changes shape to focus near or far objects on the retina
retina
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
transduction
in sensation, the transforming of stimulus energies, such as sights and sounds, into neural impulses our brains can interpret
retinal disparity
by comparing retinal images from the two eyes, the brain computes distance; the greater the disparity (difference) between the two, the closer the object
vestibular sense
our sense of body movement and position that enables our sense of balance
rods
retinal receptors that detect black, white, and gray, and are necessary for peripheral and twilight vision
optic nerve
the nerve that carries neural impulses from the eye to the brain
cochlea
a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
gate control theory
the theory that the spinal cord contains a neurological “gate” that blocks pain signals or allows them to pass on to the brain
cones
retinal receptor cells that detect fine detail and give rise to color sensations
trichromatic theory
the theory that the firing of red, green, and blue cones cause color vision. Also known as the Young-Helmholtz theory.
olfaction
the sense of smell
perceptual constancy
perceiving objects as unchanging (having consistent color, shape, and size) even as illumination and retinal images change
Neurons
a nerve cell; the basic building block of the nervous system
Myelin sheath
a fatty tissue that covers the axons of some neurons and helps speed neural impulses as the impulse hops from one node to the next
endorphins
natural, opiate-like neurotransmitters linked to pain control and to pleasure
motor neurons
neurons that carry outgoing information from the brain and spinal cord to the muscles and glands
axon
the extension of a neuron that passes messages to other neurons or to muscles or glands
synapse
the meeting point between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. The tiny gap at this site is called the synaptic gap or synaptic cleft.
acetylcholine (Ach)
a neurotransmitter that enables muscle action, learning and memory. With Alzheimer’s disease, neurons that produce this deteriorate.
Hormones
chemical messengers produced by endocrine glands that are carried by the bloodstream to other body tissues
Dendrites
a neuron’s branching extensions that receive messages from other cells and conduct impulses toward the cell body
neurotransmitters
chemical messengers that cross the synaptic gaps between neurons
sensory neurons
neurons that carry incoming information from the body’s tissues and sensory receptors to the brain and spinal cord
pituitary gland
the endocrine system’s most influential gland that regulates growth and controls other endocrine glands. This gland is influenced by the brain’s hypothalamus.
central nervous system
the brain and spinal cord make up this division of the nervous system
autonomic nervous system
the division of the peripheral nervous system that controls the glands and the muscles of internal organs (like the heart)
medulla
the base of the brainstem that controls heartbeat and breathing
limbic system
a neural system associated with emotions and drives that includes the amygdala, hypothalamus, and hippocampus. This system is located below the cerebral hemispheres.
peripheral nervous system
all of the neurons that are not in the central nervous system. Carries information to and from the central nervous system.
sympathetic nervous system
a subdivision of the autonomic nervous system that activates nerves, glands and muscles in times of stress or threat, preparing the body for action
cerebellum
this brain structure coordinates movement output and balance and enables nonverbal learning and memory. It is located at the rear of the brainstem.
hypothalamus
a neural structure that directs eating, drinking, and body temperature, helps govern the endocrine system, and is linked to emotion and reward. It is located below the thalamus.
somatic nervous system
the division of the peripheral nervous system that controls the body’s skeletal muscles and voluntary movements
parasympathetic nervous system
the division of the autonomic nervous system that calms the body, conserving its energy
thalamus
the brain’s sensory control center. It directs messages to the sensory receiving areas in the cortex and transmits replies to the cerebellum and medulla.
amygdala
two neural clusters in the limbic system linked to emotion, specifically aggression and fear
hippocampus
a neural center in the limbic system that helps process explicit memories of facts and events for storage
motor cortex
an area at the rear of the frontal lobes that controls voluntary movements
parietal lobes
the portion of the cerebral cortex that receives sensory input for touch and body position. These lobes lie at the top of the head and toward the rear.
Magnetic resonance imaging (MRI)
a technique to show brain anatomy that uses magnetic fields and radio waves to produce computer-generated images of soft tissue
corpus callosum
the large band of neural fibers connecting the two brain hemispheres and carrying messages between them
Broca’s area
an area of the frontal lobe that controls language expression by directing the muscle movements involved in speech
temporal lobes
the portion of the cerebral cortex that includes auditory areas that receive information from the ears. These lobes are roughly above the ears.
Functional MRI (fMRI)
these scans show brain function and structure by revealing bloodflow and comparing successive MRI scans
Frontal lobes
the portion of the cerebral cortex involved in speaking, muscle movements, making plans and judgement. These lobes lie just behind the forehead.
occipital lobes
the portion of the cerebral cortex that receives information from the visual fields. These lobes are located at the back of the head.
Electroencephalogram (EEG)
an amplified recording of the waves of electrical activity that sweep across the brain’s surface measured by electrodes placed on the scalp
Positron emission tomography (PET)
a visual display of brain activity that detects where a radioactive form of glucose goes while the brain performs a given task
Behavioral genetics
the study of the relative power and limits of genetic and environmental influences on behavior
REM sleep
rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur. The muscles are relaxed but other body systems are active in this stage.
sleep apnea
a sleep disorder characterized by temporary cessations of breathing (in which breathing stops) during sleep and repeated momentary awakenings
classical conditioning
a type of learning in which we link two or more stimuli; as a result, the first stimulus leads to a response in anticipation of the second stimulus
heritability
the extent to which differences among individuals can be attributed to their differing genes. This statistic takes a value between 0 and 1.
insomnia
a sleep disorder characterized by recurring problems in falling or staying asleep
stimulants
drugs (such as caffeine, nicotine, and cocaine) that excite neural activity and speed up body functions
unconditioned stimulus (UCS)
in classical conditioning, a stimulus that naturally and automatically triggers an unconditioned response
circadian rhythm
our biological clock; regular bodily rhythms that occur on a 24-hour cycle (for example, temperature and wakefulness)
narcolepsy
a sleep disorder characterized by uncontrollable sleep attacks. The sufferer may lapse directly into REM sleep, often at inopportune times.
depressants
drugs (such as alcohol) that reduce neural activity and slow body functions
unconditioned response (UCR)
in classical conditioning, an unlearned, naturally occurring response to an unconditioned stimulus (such as salivation to food in the mouth)
conditioned stimulus (CS)
in classical conditioning, an originally neutral stimulus that, after association with an unconditioned stimulus, comes to trigger a conditioned response
stimulus discrimination
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 from similar responses that are not reinforced.)
operant conditioning
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
schedules of reinforcement
in operant conditioning, any event that strengthens the behavior it follows
Conditioned response (CR)
in classical conditioning, a learned response to a previously neutral (but now conditioned) stimulus
extinction
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
reinforcement
in operant conditioning, any event that strengthens the behavior it follows