Find over 25,000 psychological definitions


positive schizophrenia

a form of schizophrenia in which positive symptoms predominate, as evidenced in bizarre behavior, illogical speech or writing, or expression of hallucinations and delusions. Although more dramatically evident than negative schizophrenia, the positive aspect is usually less challenging to treat. [defined in 1982 by U.S. psychiatrists Nancy C. Andreasen and Scott A. Olsen]

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

January 23rd 2025

functional measurement

functional measurement

a procedure that measures the subjective experience of stimuli as that experience changes across different contexts. Two or more stimuli are presented in various combinations to an observer who assigns ratings to each. These ratings are then integrated according to a simple arithmetical law discovered by examining the way in which the observer’s ratings change when the combination of stimuli is changed.