Reasoning: in mentally retarded, 221-222; in prepsychotic children, 225
Reciprocity,93
Reconstruction: cognitive, 61; conceptual, 68; memory, 118.
Reflexes, 172-173
Regression, 132, 255, 273
Regulation: cognitive, 48--50, 53, 58, 165; interindividual, 55;
systems of, 167
Relations: horizontal, 42; oblique, 42; vertical, 42
Relationships, functional, 92
Representation: 179; collective, 62; system of, 41,169; unconscious, 38--39,
68
Repression, unconscious, 67
Response, 25-26
Reversibility, operative, 54,97
Rule of couples, 40
S
Schema, 14, 33, 102, 119
Scheme: 14,33,43,102,104,106,112,118--119,156-157,174,177;
conceptualization of, 40; hereditary, 173; preoperational, 107-108;
sensorimotor, 35, 114
Semiotic function, 34, 158, 178, 190, 210, 264
Signals, 34
Signifiers: 34,178; development of, 160, 192
Signs, 34, 192, 232
Smiling reaction, 176
Sqcieties, human, 55
Stages: cross-