viii Contents 



PAGE 



Learning without Tuition . . . . . . .182 



Tests with Mechanisms 184 



Tests with Signals 195 



Experiments on the Influence of Tuition .... 209 



Introduction ... 209 



Imitation of Human Beings . ... 211 



Imitation of Other Monkeys 219 



Learning apart from Motor Impulses .... 222 



General Mental Development of the Monkeys . . . 236 



LAWS AND HYPOTHESES OF BEHAVIOR 241 



THE EVOLUTION OF THE HUMAN INTELLECT .... 282 



