This book presents a series of studies loosely organized within the general area of human and animal motivation. For the most part chapters report separate pieces of research which are linked together by uniformity of purpose. In addition to being editor, Eysenck was senior author on eight and co-author on three of the 24 chapters. Twelve others—colleagues of Eysenck—participated in the writing. Three of these had been PhD candidates under his supervision and their contributions were taken from their theses.
Part 1, which is approximately two thirds of the entire book, is devoted to human research. This is divided into two sections: A and B. Results obtained from testing a group of high-drive and a group of low-drive male adolescents are contrasted in section A. Section B consists of three chapters integrated under the heading "Ego Involvement and Attitudes as Motivating Factors." Part 2, the final third, discusses a