In a brief introduction to the book, Prof. R. S. Woodworth aptly emphasizes that racial psychology is a subject requiring unusually painstaking types of study, lest the results will be misleading. Race prejudices, misleading facts, personal equations, individual differences in the members of a race, language handicaps and habits of thought and action are among the factors liable to interfere with any interpretation of the findings.

The author, Dr. Garth, Professor of Experimental Psychology in the University of Denver, confesses “that his first investigations in the field of race psychology were accompanied by a silent conviction that he would find clear-cut racial differences in mental processes,” but he has attempted