THE SENSE OF HEARING
Experiments on hearing in the dancer made by Rawitz, by Panse, by Cyon, by
Alexander and Kreidl, by Zoth, and by Kishi—Hearing and the voice—
Methods of testing sensitiveness to sounds—Results of tests with adults—
Importance of indirect method of experimentation—Results of tests with
young—The period of auditory sensitiveness—Individual differences.
CHAPTER VII
THE SENSE OF SIGHT: BRIGHTNESS VISION
What is known concerning sight in the dancer—Brightness vision and color vision—Methods of testing brightness vision, the visual discrimination apparatus—Motives for discrimination and choice—Punishment versus reward as an incentive in animal experiments—Hunger as an incentive—An electric stimulus as an incentive—Conditions for brightness vision tests— White-black vision—Evidence of preference—Check experiments—Conclusion.
CHAPTER VIII
THE SENSE OF SIGHT: BRIGHTNESS VISION (Continued)
The delicacy of brightness discrimination—Methods of testing the dancer's ability to detect slight differences in brightness—Results of tests with gray papers—Relation of intensity of visual stimuli to the threshold of discrimination—Weber's law apparatus and method of experimentation— Results of Weber's law tests—Practice effects, the training of vision— Description of the behavior of the dancer in the discrimination box experiments—Modes of choice: by affirmation; by negation; by comparison— Evidence of indiscriminable visual conditions.