Table of Contents:
- 14. Intellectual function, by H. E. King
- 15. Learning and retention, by A. K. Stauffer
- 16. Ability to abstract, by W. R. King
- 17. Word association experiments, by S. R. Rashkis
- 19. Critical flicker frequency, K. M. Young
- 20. Affectivity, by Mortimer Garrison, jr