Transcriber’s Note:
The cover image was created by the transcriber and is placed in the public domain.
The publishers offer this book primarily as a popular treatiseon the measurement of intelligence by scientific methods.
Every effort has been made to conform to the soundest scientificprinciples, both in the preparation of the Mentimeter tests,around which the volume is largely written, and in the introductoryand explanatory chapters, in which the principles ofapplied psychology, as they bear upon mental tests, are statedin popular language.
The Mentimeters are based upon Doctor Trabue’s experience(1) as Assistant in Educational Psychology at Teachers College,Columbia University, (2) as psychological investigator of theintellectual status of inmates of charitable institutions and ofpupils in the public schools, (3) as author of various intellectualand educational scales, widely used by psychologists andeducators, (4) as Chief Psychological Examiner in two of thelargest Army camps, directing the intellectual examination ofmore than a hundred thousand soldiers, (5) as Captain in theAdjutant General’s Department, U. S. Army, measuring theintellectual abilities of men in the Aviation Service, and (6)as Assistant Professor in Columbia University, giving instructionin the theory and practice of intellectual measurementsand directing the application of such measurements to tens ofthousands of school pupils.
Frank Parker Stockbridge, Doctor Trabue’s collaborator, is anauthor and journalist of a high order. As managing editor ofPopular Mechanics and contributor to the World’s Work,Harper’s, Popular Science Monthly, etc., he has been throwninto contact with important affairs in the world of science sovithat he is especially equipped to work with Doctor Trabue inpresenting this interesting subject. As director of the publicitycampaign of the American Library Association War Fund hiscontact with the Army and the results of the biggest experimentin the way of psychological tests that the world has ever seenwas invaluable to him in this work. The publishers feel that thecollaboration is a particularly happy one.
The success of the scientific method of testing intelligenceamong both officers and men in the Ar