Psychology 25 Learning, Psychology of 10 History 9 Psychophysiology 9 Conditioned response 5 Behaviorism (Psychology) 4 Child psychology 4 Cognition 4 Human behavior 4 Clinical psychology 3 Difference (Psychology) 3 Educational psychology 3 Motivation (Psychology) 3 Operant behavior 3 Perception 3 Personality 3 Psychometrics 3 Reinforcement (Psychology) 3 Research 3 Aesthetics 2 Behavior modification 2 Child development 2 Counseling 2 Developmental psychology 2 Environmental psychology 2 Exceptional children 2 Intellect 2 Interpersonal relations 2 Psycholinguistics 2 Psychological aspects 2