1. Scoring formulas and probability considerations

   • Alexander Calandra

   OriginalPaper Pages: 1 - 9

2. The phi coefficient and chi square as indices of item validity

   • J. P. Guilford

   OriginalPaper Pages: 11 - 19

3. The application of Sheppard's correction for grouping

   • George A. Ferguson

   OriginalPaper Pages: 21 - 27

4. On the rectilinear prediction of oblique factors

   • Harry H. Harman

   OriginalPaper Pages: 29 - 35

5. Genetic emergence of factor specificity

   • T. W. Richards

   OriginalPaper Pages: 37 - 42

6. Note on the mathematical theory of interaction of social classes

   • N. Rashevsky

   OriginalPaper Pages: 43 - 47

7. Maximum likelihood estimation and factor analysis

   • Gale Young

   OriginalPaper Pages: 49 - 53

8. A machine method for computing the biserial correlation coefficient in item validation

   • Elmer B. Royer

   OriginalPaper Pages: 55 - 59

9. Music ability

   • J. E. Karlin

   OriginalPaper Pages: 61 - 65