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A procedure of sterilization in the interests of race betterment soon becomes involved with measurements of mental capacity. The present monograph is concerned with recent German efforts of this nature. It consists principally of twenty-eight case reports illustrating, in an elementary way, application of the Bühler-Hetzer procedure to the function. Vowinckel appears to have acquired this technic primarily ad hoc, and to have only limited perspective on related endeavors; foreign work is practically ignored, though there are mentions of Terman and Gesell.
It is from the cultural standpoint that the work has its chief interest to the American profession. Several years ago it was well said that American psychology was strong in method but weak in theory, and German psychology strong in theory but weak in method. This study bears out the statement and makes a further suggestion. Its basic criticism of the Binet procedures is well founded, and there