The psychometric characteristics of an adult class in psychologyhttps://www.upress.umn.edu/test-division/bibliography/1960-1969/1965/clark_psychometric_1965https://www.upress.umn.edu/logo.png
D.F. Clark
(1965)
The psychometric characteristics of an adult class in psychology
British Journal of Psychiatry, 111(477):745 --753.