1. Estimation and tests of significance in factor analysis

   • C. Radhakrishna Rao

   OriginalPaper Pages: 93 - 111

2. Reliability formulas for noncompleted or speeded tests

   • Louis Guttman

   OriginalPaper Pages: 113 - 124

3. A mathematical model for conditioning

   • G. W. Boguslavsky

   OriginalPaper Pages: 125 - 138

4. Two models of group behavior in the solution of eureka-type problems

   • Irving Lorge
   • Herbert Solomon

   OriginalPaper Pages: 139 - 148

5. On the design of automata and the interpretation of cerebral behavior

   • Stanley Frankel

   OriginalPaper Pages: 149 - 162

6. Book reviews

   • Bert F. Green
   • Harold Webster
   • H. J. Eysenck

   BookReview Pages: 163 - 169