Contents xv 



CHAPTER XV 



PAGE 



THE EFFICIENCY OF TRAINING METHODS .... 239 



Importance of measuring the efficiency of educational 

 methods Rapidity of learning and permanency of modifica- 

 tions wrought by training Results of a study of the efficiency 

 of discrimination methods Comparison by means of indices 

 of modifiability Number of tests per series versus number of 

 series Efficiency as measured by memory tests. 



CHAPTER XVI 



THE DURATION OF HABITS: MEMORY AND RE-LEARNING . 251 

 Measures of the permanency of modifications in behavior 



The duration of brightness and color discrimination habits 



The relation of learning to re-learning Can a habit which 

 has been lost completely be re-acquired with greater facility 

 than it was originally acquired? Relation of special train- 

 ing to general efficiency Does the training in one form of 

 labyrinth aid the dancer in acquiring other labyrinth habits? 



CHAPTER XVII 



INDIVIDUAL, AGE, AND SEX DIFFERENCES IN BEHAVIOR . . 264 



Individual peculiarities in sensitiveness, docility, and initia- 

 tive The relation of docility to age The individual result 

 and the average How averages conceal facts Sex differ- 

 ences in docility and initiative Individual differences of 

 motor capacity which seem to indicate varieties Is the 

 dancer pathological ? 



CHAPTER XVIII 



THE INHERITANCE OF FORMS OF BEHAVIOR .... 278 



Characteristics of the race Inheritance of the tendency 

 to whirl in a particular way Tests of the inheritance of 

 individually acquired forms of behavior. 



INDEX 285 



