Ⅰ Introduction 3
Ⅱ Development of Perception：Discrimination of Depth Compared with Discrimination of Graphic Symbols＆ELEANOR J．GIBSON 5
Discussion 24
HERMAN A．WITKIN 24
Group Discussion 29
Ⅲ Development of Mediating Responses in Children＆TRACY S．KENDLER 33
Discussion 48
LLOYD N．MORRISETT 48
Group Discussion 51
Ⅳ Verbal Factors in the Discrimination Learning of Children＆CHARLES C．SPIKER 53
Discussion 69
HAROLD W．STEVENSON 69
Group Discussion 70
Ⅴ Psychological Significance of Styles of Conceptualization＆JEROME KAGAN，HOWARD A．Moss，and IRVING E．SIGEL 73
Discussion 112
RILEY W．GARDNER 112
HERMAN A．WITKIN 118
Group Discussion 122
Ⅵ Development of Equivalence Transformations in Children＆JEROME S．BRUNER and ROSE R．OLVER 125
Discussion 141
Group Discussion 141
Ⅶ Mathematical Models in Research with Children＆RICHARD C．ATKINSON 145
Discussion 157
MICHAEL A．WALLACH 157
Group Discussion 161
Ⅷ Soviet Research on Intellectual Processes in Children＆DANIEL E．BERLYNE 165
Ⅸ Some Soviet Research on Learning and Perception in Children＆HERBERT PICK 185
Ⅹ SUMMARY 191