Variation in test validity with variation in the distribution of item difficulties, number of items, and degree of their intercorrelation Hubert E. Brogden OriginalPaper Pages: 197 - 214
A first-order method for estimating correlation coefficients John A. Weichelt OriginalPaper Pages: 215 - 221
A prepunched master deck for the computation of square roots on IBM electrical accounting equipment Wm. A. Reynolds OriginalPaper Pages: 223 - 238
A brief comment on Thurstone's note on a reanalysis of Davis' reading tests Frederick B. Davis OriginalPaper Pages: 249 - 255