REFRACTORY PERIOD

A duration during which nerves or muscles are unable to react to stimuli, especially following prior stimulation. An absolute refractory period is marked by...

REGRESSION LINE

Curve fitted into a set of paired data in regression analysis; in linear regression, the curve becomes a straight line.

REHABILITATION PROGRAM

Generally designed to meet the specific needs of the subject, a cohesive system of rehabilitation services intended to support the subject in recovering following...

REINFORCER

When occurring in a dependent relationship, contingency, or response, a stimulus or condition which effectively brings about reinforcement to a particular response.

RELATIONAL FRAME

Framework which allows description of a relationship between two entities according to prior experience.

RELATIVE RISK

Comparison of the ratio of occurrence of a specific disorder or condition between a group having specific risk factors as opposed to those not...

RELEVANT-IRRELEVANT TEST

Query style in polygraph testing which results in physiological responses to questions relevant to a crime, which are then compared to responses to questions...

REM SLEEP

Normal stage of sleep, characterized by random, rapid movement of the eyes. Criteria for determining REM sleep include low muscle tone and rapid eye...

REMORSE

Bitter regret, moral anguish stemming from contrition for past misdeeds.

RENSHAW CELL

Inhibitory interneurons present in the gray matter of the spinal cord; component of a negative feedback system which curtails fast, successive firing of motor...

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