THE DURATION OF HABITS: MEMORY AND RE-LEARNING
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 training 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
Individual peculiarities in sensitiveness, docility, and initiative—The relation of docility to age—The individual result and the average—How averages conceal facts—Sex differences 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
Characteristics of the race—Inheritance of the tendency to whirl in a particular way—Tests of the inheritance of individually acquired forms of behavior.