Bouvier, E. A., Perry, N. C., Michael, W. B. and Hertzka, A. F. " A Study of the Error in the Cosine-Pi Approximation to the Tetrachoric Coefficient of Correlation." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XIV (1954), 690-699.
2.
Cattell, R. B.Factor Analysis. New York: Harber & Brothers, 1952.
3.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Hypochondriasis Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVII ( 1957), 566-577.
4.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Depression Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1957), 578-585.
5.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Hysteria Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVII ( 1957), 586-582.
6.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Psychopathic Deviate Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII (1958), 91-98.
7.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Paranoia Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1958), 99-107.
8.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Psychasthenia Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1958), 293-300.
9.
Comrey, A. L. "A Factor Analysis of Items on the MMPI Hypo-mania Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1958), 313-323.
10.
Comrey, A. L. "A Factor Analysis of Items on the F Scale of the MMPI." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1958), 621-632.
11.
Comrey, A. L. "A Factor Analysis of Items on the K Scale of the MMPI." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1958), 633-639.
12.
Comrey, A. L. and Marggraff, Waltraud. "A Factor Analysis of Items on the MMPI Schizophrenia Scale." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII ( 1958), 301-311.
13.
Guilford, J. P.Fundamental Statistics in Psychology and Education. New York: McGraw-Hill Book Company, Inc., 1956.
14.
Ferguson, G. A. "The Factorial Interpretation of Test Difficulty." Psychometrika, VI (1941), 323-329.
15.
Kaiser, Henry F. "An Analytic Rotational Criterion for Factor Analysis." A paper presented to the American Psychological Association, September, 1955.
16.
Smith, R. G.A Factorial Study of Attitude toward the Negro. Unpublished Ph.D. thesis, University of Illinois, 1950.
17.
Wherry, R. J. and Gaylord, R. H. "Factor Pattern of Test Item and Tests as a Function of the Correlation Coefficient: Content, Difficulty, and Constant Error Factors." Psychometrika, IX (1944), 237-244.