-
WWI intelligence testing begins
-
Psychology by John B. Watson
-
Classic Conditioning pulblished by Watson and Rayner
-
Gestalt Theory brought to U.S.
-
Jean Piaget publishes The Moral Judgement of Children
-
Thematic Appreception Test
-
Weschsler-Bellevue test
-
Wechsler Intelligence Scale for Children
-
Wechsler Adult Intelligence Scale by David Welscher
-
Raymond Cattell discovers fluid and crystallised intelligence
-
The 180 elementary abilities discovered by Guilford
-
Carroll proposes the three-stratum model of cognitive ability
-
Sternberg and Wagner design a test of practical intelligence