1. Maximum validity of a test with equivalent items

   • Ledyard R Tucker

   OriginalPaper Pages: 1 - 13

2. Factor analysis and body types

   • L. L. Thurstone

   OriginalPaper Pages: 15 - 21

3. Serial correlation

   • Nathan Jaspen

   OriginalPaper Pages: 23 - 30

4. A factorial analysis of olfaction

   • E. H. Hsü

   OriginalPaper Pages: 31 - 42

5. Graphical and tabular aids for determining sample size when planning experiments which involve comparisons of percentages

   • Frances Swineford

   OriginalPaper Pages: 43 - 49

6. A simple graphical method for orthogonal rotation of axes

   • Wayne S. Zimmerman

   OriginalPaper Pages: 51 - 55

7. A new descriptive statistic: The parabolic correlation coefficient

   • Charles C. Peters

   OriginalPaper Pages: 57 - 69