Guilford, J. P.Psychometric Methods. New York: McGraw-Hill Book Company, 1954.
2.
Iker, H. P. and Perry, N. C. "A Further Note Concerning the Reliability of the Point Biserial Correlation." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT , XX (1960), in press.
3.
Perry, N. C. and Michael, W. B. "A Note Concerning the Reliability of a Point Biserial Coefficient for Large Samples." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVIII (1958), 139-143.
