00904cam a22002651 4500 e 31000712 DLC 20260227111221.0 850627s1931 nyua b s000 0 eng c e 31000712 (OCoLC)12208389 Library, U.S. Office of Education KyU KyU DLC premarc LB3061 .C647 Cornell, Ethel Letitia, 1892- The effect of trait differences in ability grouping, by Ethel L. Cornell ... Albany, The University of the State of New York Press, 1931. 26, [2] p. diagrs. 23 cm. University of the state of New York bulletin ... no. 981. Oct. 1, 1931 "References": p. 26. Ability. Educational tests and measurements Grading and marking (Students) Ability Testing. 21126 21126