Abstract
A method for computing the biserial correlation coefficients with the aid of punch card equipment is oultined. A numerical example and a work sheet layout is included in the presentation.
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References
Dunlap, J. W. Computation of descriptive statistics. New York: Ralph C. Coxhead Corporation, 1937, 78–81.
Dunlap, J. W. and McNamara, W. J. A graphical method for computing the standard error of biserialr.J. exper. Educ., 19342, 274–277.
Pearson, K. On a new method of determining correlation between a measured characterA and a characterB, of which only the percentage of cases whereinB exceeds of falls short of a given intensity is recorded for each grade ofA.Biometrika, 1909,7, 96–105.
Additional information
This method was developed by Dr. Elmer B. Royer prior to his untimely death on April 3, 1939. It has been prepared for publication by some of his former associates, not only as a contribution to science but also as a tribute to the memory of a true scientist.
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Royer, E.B. A machine method for computing the biserial correlation coefficient in item validation. Psychometrika 6, 55–59 (1941). https://doi.org/10.1007/BF02288575
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DOI: https://doi.org/10.1007/BF02288575