Education Thought and thinking Child study Knowledge, Theory of Philosophy Aims and objectives Educational psychology Learning, Psychology of Attitude (Psychology) Cognition in children Perception Personality Biography Child development Cognition Cognition (Child psychology) Cognition (Child psychology)--Addresses, essays, lectures Education, Preschool Learning Learning process Learning, Psychology Memory Memory disorders Play Psycholinguistics Psychologists Psychology Psychology and literature Public opinion Recomstruction (1939-1951)