The Return Coupon as a Measure of Advertising Efficiency
Fluctuations in Mental Production When Motivation is the Main Variable
Influence of Mental Level in the Formation of Boys' Gangs
Legibility of Bodoni, Baskerville Roman and Cheltenham Type Faces
A combination mental test for clinical use
Freshman tests in a small college
Prediction formulae for teams of aptitude tests
Labor turnover and mental alertness Test scores
Causative factors in mental inferiority and the prevention of degeneracy
An investigation of the sex relationship, marriage, delinquency and truancy of children assigned to special public school classes
Job analysis and the curriculum
[Review of A comparison of the intelligence and training of school children in a Massachusetts town and Standard Educational Tests in the Elementary Training Schools of Missouri],
The human instincts in business
University of Iowa studies in psychology