behaviourism(n = noun.cognition) behaviorism, behavioristic psychology, behaviouristic psychology - an approach to psychology that emphasizes observable measurable behavior;
is a kind of experimental psychology, psychonomics
has particulars: reflexology
Derived forms noun behaviourist₁, adjective behaviouristic₁

   same as behaviorism. [WordNet 1.5]

behaviourism, n. (US behaviorism) Psychol.
1 the theory that human behaviour is determined by conditioning rather than by thoughts or feelings, and that psychological disorders are best treated by altering behaviour patterns.
2 such study and treatment in practice.

Derivative:
behaviourist n. behaviouristic adj.