-yəˌrizəm noun
( -s )
1. : the doctrine that the data of psychology consist exclusively of the observable evidences of organismic activity especially when expressible in operational or physicalistic terms — compare behavior , 1b, introspectionism , mentalism
2. : the application of principles of behavioral science to industry, personality evaluation, the arts, or literary criticism
3. : the characteristic behavior of a defined organism or group under defined conditions