Examines behavioral processes in terms of their adaptive value for members of a species over the course of many generations.
This uses theory and research to better understand the positive, adaptive, creative, and fulfilling aspects of human existence.
The science that studies behavior and the physiological and cognitive processes that underlie behavior, and it is the profession that applies the accumulated knowledge of this science to practical problems.
This refers to the widely shared customs, beliefs, values, norms, institutions, and other products of a community that are transmitted socially across generations.
The ability to use that characteristics and format of a cognitive test to maximize one's score.
Any measurable conditions, events, characteristics, or behaviors that are controlled or observed in a study.
This describes the actions or operations that will be used to measure or control a variable.
Also known as subjects, these are the persons or animals whose behavior is systematically observed in a study.
A periodical that publishes technical and scholarly material, usually in a narrowly defined area of inquiry.
These consist of differing approaches to the observation, measurement, manipulation, and control of variables in empirical studies.
This is a condition or event that an experimenter varies in order to see its impact on another variable.
This is that variable that is thought to be affected by manipulation of the independent variable.
This consists of the subjects who receive some special treatment in regard to the independent variable.
This consists of similar subjects who do not receive the special treatment given to the experimental group.
This is a research method in which the investigator manipulates a variable under carefully controlled conditions and observes whether any changes occur in a second variable as a result.
Any variables other than the independent variable that seem likely to influence the dependent variable in a specific study.
Confounding of Variables
This occurs when two variables are linked in a way that makes it difficult to sort out their specific effects.
This happens when all subjects have an equal chance of being assigned to any group or condition in the study.
This is a numerical index of the degree of relationship between two variables.
In this, a researcher engages in careful observation of behavior without intervening directly with the subjects.
In this, researchers use questionnaires or interviews to gather information about specific aspects of participants' background and behavior.
The much larger collection of animals of people (from which the sample is drawn) that researchers want to generalize about.
This exists when a sample is not representative of the population from which it was drawn.
These occur when participants' expectations lead them to experience some change even though they receive empty, fake, or ineffectual treatment.
Social Desirability Bias
This is a tendency to give socially approved answers to questions about oneself.
This occurs when a researcher's expectations or preferences about the outcome of a study influence the results obtained.
A research strategy in which neither subjects nor experimenters know which subjects are in the experimental or control groups.
Also known as the cell body, this contains the cell nucleus and much of the chemical machinery common to most cells.
A long, thin fiber that transmits signals away from the soma to other neurons or to muscles or glands.
Absolute Refractory Period
The minimum length of time after an action potential during which another action potential cannot begin.
A microscopic gap between the terminal button of one neuron and the cell membrane of another neuron.
A process in which neurotransmitters are sponged up from the synaptic cleft by the presynaptic membrane.
Somatic Nervous System
Made up of nerves that connect to voluntary skeletal muscles and to sensory receptors.
Afferent Nerve Fibers
Axons that carry information inward to the central nervous system from the periphery of the body.
Efferent Nerve Fibers
Axons that carry information outward from the central nervous system to the periphery of the body.
Autonomic Nervous System (ANS)
Made up of nerves that connect to the heart, blood vessels, smooth muscles, and glands.
The branch of the autonomic nervous system that mobilizes the body's resources for emergencies.
The branch of the autonomic nervous system that generally conserves bodily resources.
Electrical Stimulation of the Brain (ESB)
Involves sending a weak electric current into a brain structure to stimulate (activate) it.
Transcranial Magnetic Stimulation (TMS)
A technique that permits scientists to temporarily enhance or depress activity in a specific area of the brain.
Includes the cerebellum and two structures found in the lower part of the brainstem: the medulla and the pons.
Meaning "little brain", this is a relatively large and deeply folded structure located adjacent to the back surface of the brainstem.
The largest and most complex region of the brain, encompassing a variety of structures, including the thalamus, hypothalamus, limbic system, and cerebrum.
A structure in the forebrain through which all sensory information (except smell) must pass to get to the cerebral cortex.
A structure found near the base of the forebrain that is involved in the regulation of basic biological needs.
A loosely connected network of structures located roughly along the border between the cerebral cortex and deeper subcortical areas.
Neurons that are activated by performing an action or by seeing another monkey or person perform the same action.
The bundle of fibers that connects the cerebral hemispheres (the corpus callosum) is cut to reduce the severity of epileptic seizures.
Consists of glands that secrete chemicals into the bloodstream that help control bodily functioning.
Releases a great variety of hormones that fan out within the body, stimulating actions in the other endocrine glands.
A male sex hormone produced by the testes; women secrete smaller amounts of testosterone from the adrenal cortex and ovary.
Threadlike strands of DNA (deoxyribonucleic acid) molecules that carry genetic information.
In these, researchers assess hereditary influence by examining blood relatives to see how much they resemble one another on a specific trait.
In these, researchers assess hereditary influence by comparing the resemblance of identical twins and fraternal twins with respect to a trait.
Assess hereditary influence by examining the resemblance between adopted children and both their biological and their adoptive parents.
Refers to the reproductive success (number of descendants) of an individual organism relative to the average reproductive success in the population.
Posits that heritable characteristics that provide a survival or reproductive advantage are more likely than alternative characteristics to be passed on to subsequent generations and thus they come to be "selected" over time.
An inherited characteristic that increased in a population (through natural selection) because it helped solve a problem of survival or reproduction during the time it emerged.
The opening in the center of the iris that helps regulate the amount of light passing into the rear chamber of the eye.
The neural tissue lining in the inside back surface of the eye; it absorbs light, processes images, and sends visual information to the brain.
A tiny spot in the center of the retina that contains only cones; visual acuity is greatest at this spot.
Receptive Field of a Visual Cell
The retinal area that, when stimulated, affects the firing of that cell.
That point at which the axons from the inside half of each eye cross over and then project to the opposite half of the brain.
Neurons that respond selectively to very specific features of more complex stimuli.
Subtractive Color Mixing
Works by removing some wavelengths of light, leaving less light than was originally there.
Additive Color Mixing
Works by superimposing lights, putting more light in the mixture than exists in any one light by itself.
States that the human eye has three types of receptors with differing sensitivities to different light wavelengths.
Opponent Process Theory
Holds that color perception depends on receptors that make antagonistic responses to three pairs of colors.
A drawing that is compatible with two different interpretations that can shift back and forth.
Involves the failure to see fully visible objects or events in a visual display because one's attention is focused elsewhere.
The process of detecting specific elements in visual input and assembling them into a more complex form.
An inference about what form could be responsible for a pattern of sensory stimulation.
Involves interpretation of visual cues that indicate how near or far away objects are.
Refers to the fact that objects within 25 feet project images to slightly different locations on the right and left retinas, so the right and left eyes see slightly different views of the object.
A tendency to experience a stable perception in the face of continually changing sensory input.
Involves an apparently inexplicable discrepancy between the appearance of a visual stimulus and its physical reality.
Objects that can be represented in two-dimensional pictures but cannot exist in three-dimensional space.
This runs the length of the spiraled cochlea and holds the auditory receptors called hair cells.
States that perception of pitch corresponds to the vibration of different portions, or places, along the basilar membrane.
States that perception of pitch corresponds to the rate, or frequency, at which the entire basilar membrane vibrates.