1. Adkins, D. C. Construction and analysis of achievement tests. Washington, D. C.: U. S. Government Printing Office, 1947.
2. Baxter, B. An experimental analysis of the contribution of speed and level in an intelligence test.J. educ. Psychol., 1941,32, 285–296.
3. Buros, O. K. (Ed.) The third mental measurements yearbook. New Brunswick: Rutgers University Press, 1949.
4. Conrad, H. Information which should be provided by test publishers and testing agencies on the validity and use of their tests. Proceedings, 1949 Invitational Conference on Testing Problems, pp. 63–68. Princeton: Educational Testing Service, 1950.
5. Cronbach, L. J. Coefficient “alpha” and the internal structure of tests. To be published.