28. Lee J. Cronbach ( 1916 – 2001) profesor la Universitatea Stanford Cronbach, L.J. (1951) Coefficient alpha and the internal structure of tests. Psychometrika, 16, 297–334. Cronbach, L.J. şi Meehl, P.E. (1955) On Construct Validity: Issues of Method and Measurement. Cronbach, L.J. şi Snow, R.E.(1977). Aptitudes and instructional methods: A handbook for research on aptitude-treatment interactions. New York: Irvington.