SCREENING AUDIOMETRY
Rapid measurement of the hearing of an individual or a group against a predetermined limit of normality.
SEASONAL VARIATION
Often attributed to photoperiodism, changes which occur in behavioral, psychological, and physiological patterns as seasons vary or in reaction to…
SECONDARY CONTROL
Behavior pattern which does not directly control the environment, but is intended to alter oneself to be more compatible with…
SECOND-ORDER CONDITIONING
Use of a previously successfully conditioned stimulus as the unconditioned stimulus for further conditioning, employed in Pavlovian conditioning. See: higher…
SEGREGATION ANALYSIS
Enumeration of progeny according to distinct and mutually exclusive phenotypes; used as a test of a putative pattern of inheritance…
SELECTIVE CELL DEATH
Process in initial development wherein neurons which are not stimulated by sensory or motor experience wither and die.
SELECTIVE VALUE
Comparative significance of any aspect in assessing the evolution of internal organs, characteristics, or species by means of natural selection.…
SALICYLISM
Salicylate overdose, most commonly introduced by an attempt at poisoning or by ingesting too much aspirin. Symptoms may include stomach…
SAMPLING WITH REPLACEMENT
Sampling method wherein a chosen sample is put back into the data pool, where it may be subsequently redrawn for…
SATIETY MECHANISM
Processes or systems within the body which are responsible for the regulation of food or fluid consumption. See also: appetitive…
SCALA MEDIA
Also referred to as the cochlear duct, one of three canals present in the cochlea and traversing its length within…
SCAPEGOATING
Practice wherein an undeserving party is singled out for unmerited negative treatment, generally by someone or something more powerful than…
SCHEDULE OF REINFORCEMENT
Any type of guideline used in conditioning which outlines which responses will be reinforced. Also known as: reinforcement schedule. See…
SCHIZOPHRENIA
Psychotic disorder (or a group of disorders) marked by severely impaired thinking, emotions, and behaviors. Patients are typically unable to…
SCHOLASTIC ACHIEVEMENT TEST
Any examination which assesses a pupil's comprehension and aptitude within core subjects of education, such as history, science, mathematics, or…
SCHWANN CELL
Any of the cells of the peripheral nervous system which wraps around a nerve fiber and covers the axons to…