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Excerpt from Manual of Mental and Physical Tests, Vol. 1: Simpler Processes; A Book of Directions Compiled With Special Reference to the Experimental Study of School Children in the Laboratory or Classroom
One need not be a close observer to perceive how markedly the interest in mental tests has developed during the past few years. Not very long ago attention to tests was largely restricted to a few laboratory psychologists; now tests have become objects of attention for many workers whose primary interest is in education, social service, medicine, industrial management and many other fields in which applied psychology promises valuable returns. It is a source of gratification to me that this book has been a positive factor in furthering this development of mental tests, and that it has found sufficient favor, both with academic investigators and teachers and with those engaged in the immediately practical task of mental examination, to exhaust the first edition in an unexpectedly short time.
Opportunity has been taken of this necessity for a new edition to make extensive revision and alterations in the text. The attempt has been made to eliminate a number of confusing typographical errors; a new and better system of abbreviations for titles of periodicals has been introduced; the directions for conducting the tests have been modified where ambiguity was felt; numerous tables and graphs have been added; the section upon the treatment of measures has been expanded; and several new tests have been inserted. These changes have so increased the material as to make it desirable to divide it into two parts, the first dealing with simpler, the second with more complex processes. The numbering of the original tests has, however, been retained for various reasons.
It would have been quite difficult for me to have undertaken to improve the text had I not received valuable assistance from many of my colleagues and co-workers.
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