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A school of psychology that confines itself to the study of observable and quantifiable aspects of behavior and excludes subjective phenomena, such as emotions or motives.

be·hav′ior·ist n.
be·hav′ior·is′tic adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.behaviorist - a psychologist who subscribes to behaviorismbehaviorist - a psychologist who subscribes to behaviorism
psychologist - a scientist trained in psychology
Adj.1.behaviorist - of or relating to behaviorismbehaviorist - of or relating to behaviorism; "behavioristic psychology"