RADIATION THERAPY
Also called radiotherapy, radiation therapy is primarily used in the treatment of cancers. A radioactive isotope may be implanted, or…
RAMI COMMUNICANTES
The nerve fibers connecting the ganglia in the sympathetic chain to spinal nerves. They include the gray and white rami.
RANDOM WALK MODEL
A reaction time and accuracy model where evidence mounts in steps, causing an inclination toward or away from an alternative…
RANGE OF AUDIBILITY
The range of audio frequencies detectable by a subject. In humans, generally that range is 20 Hz to 20 KHz.…
RAPTURE-OF-THE-DEEP SYNDROME
An acute and short-lived psychosis experienced by some deep-sea divers. It could be attributed to a higher than safe nitrogen…
RATIONALLY SUICIDAL
Having suicidal thoughts or intent based on what a reasonable person would agree is an untenable situation.
REACTION TYPE
The categories in which a psychiatric syndrome is classified in terms of major symptoms. 2. In reaction-time experiments, a certain…
REAL-LIFE TEST
In the matter of those contemplating sex-reversal surgical procedures. The test consists of a period of time spent dressing, acting…
REBOUND PHENOMENON
A test demonstrating loss of cerebellum control over the control of coordinated movement. In the test for the phenomenon, if…
RECEPTIVE VOCABULARY
A person's vocabulary defined by words he or she can understand, identify and process. It may be more extensive than…
RECIPROCAL PUNISHMENT
A punishment that fits the crime. For instance, a child caught stealing from a store might be required to help…
RECOMBINATION
The trading of hereditary components between paired chromosomes during the course of the development of sex cells (sperm or ova).…
RECREATIONAL THERAPY
Specialized recreation employed as an essential dimension of rehabilitation or therapy. Also known as therapeutic recreation.
RED-GREEN BLINDNESS
Inability to see some shades of red and green correctly, causing them to be confused. See also: deuteranopia.
REEDUCATION
Attempt to instill a certain ideology or belief system in a subject, usually against their will. A form of psychological…
REFLECTANCE
Measure of reflection commensurate with the ratio of a reflected luminous flux to an incidental luminous flux.