1. The difficulty of a test and its factor composition

   • J. P. Guilford

   OriginalPaper Pages: 67 - 77

2. A non-graphical method for transforming an arbitrary factor matrix into a simple structure factor matrix

   • Paul Horst

   OriginalPaper Pages: 79 - 99

3. The solution of simultaneous equations

   • P. S. Dwyer

   OriginalPaper Pages: 101 - 129

4. Item synonymization: A method for determining the total meaning of pencil-paper reactions

   • Theodore F. Lentz
   • Edith F. Whitmer

   OriginalPaper Pages: 131 - 139