The Application of Probit Analysis to the Results of Mental Tests

1 March 1944

journal article
research article
Published by Cambridge University Press (CUP) in Psychometrika

Vol. 9 (1) , 31-39
https://doi.org/10.1007/bf02288711

Abstract

The application of the Müller-Urban constant process to item selection, as considered in a recent paper in this journal, is shown to be closely analogous to a method now in general use for the analysis of insecticidal and other toxicological tests. This method of probit analysis gives the maximum likelihood estimates of the unknown parameters and, with the aid of published tables, the necessary computations can be rapidly performed. The present paper contains an outline of the method and an illustration of the most convenient form of computations for use in analyses of psychometric data.

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