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A Note on the Computation of Biserial r in Item Validation

Published online by Cambridge University Press:  01 January 2025

Philip H. DuBois
Philip H. DuBois*
Affiliation:
University of New Mexico
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Abstract

A method of computing biserial coefficients of correlation through the use of punch card tabulating equipment is presented. Each item is assigned a separate column and successes are punched 1. By arranging the cards on the criterion variable and obtaining progressive sums on several columns simultaneously, it is possible to obtain data for several correlations in one run of the cards through the machine.

Type
Original Paper
Information
Psychometrika , Volume 7 , Issue 2 , June 1942 , pp. 143 - 146
Copyright
Copyright © 1942 The Psychometric Society

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References

* Rover, Elmer B., “A Machine Method for Computing the Biserial Correlation Coefficient in Item Validation,” Psychometrika, 1941, 6, 55-59.

* Richardson, M. W., and Stalnaker, J. N., “A Note on the Use of Biserial R in Test Research,” Journal of General Psychology, 1933, 8, 463-65.