The use of color filters--Testing color vision by the use of transmitted
light--Green-blue vision--Green-red vision--Blue-red vision--Stimulating
value of different portions of the spectrum--Does red appear darker to the
dancer than to us?--Conclusions concerning color vision--Structure of the
retina of the dancer and its significance.


CHAPTER XI

THE ROLE OF SIGHT IN THE DAILY LIFE OF THE DANCER.

Sight and general behavior--Behavior of blinded dancers--Experimental
tests of ability to perceive form--Visual guidance in mazes--Following
labyrinth paths in the dark--The relative importance of visual, olfactory,
and kinaesthetic stimuli--Conditions for the acquisition of a motor
habit--Conditions for the execution of an habitual act.


CHAPTER XII

EDUCABILITY: METHODS OF LEARNING

The modifiability of behavior--Educational value of experimental studies
of modifiability--Methods: the problem method; the labyrinth method; the
discrimination method--Relation of method to characteristics of animal--
Simple test of the docility of the dancer--Lack of imitative tendency--
Persistence of useless acts--Manner of profiting by experience--Individual
differences in initiative.