References
- Davis , N. W. 1935 . A study in prediction based on the records of first-year students, 1934–1935 , University of Arizona thesis .
- Franzen , R. H. 1920 . The accomplishment quotient of school marks in terms of individual capacity . Teach. Coll. Rec. , 21 : 432 – 440 .
- Garrett , H. E. 1937 . Statistics in Psychology and Education , 346 New York : Longmans, Green .
- Symonds , P. M. 1927 . Measurement in Secondary Education , New York : Macmillan .