INTRODUCTION
7
suggestion of all sorts in all the tests. The descriptions of method have been made explicit at the risk of their being perhaps somewhat tedious and needlessly detailed.
The results of the experiments have been presented graphically wherever possible. In all the curves, the dotted line is for women and the unbroken line for men. The ordinates always represent the number of subjects. In no case have the results been averaged. Wherever graphic representation was impracticable, they have been grouped. The purpose of the research was norms, not averages.
