1. “A Comparison of the Effectiveness of Two Teaching Techniques on the Ability of College Students to apply Principles of Physics to New Technical Problems.” Unpublished Ph.D. dissertation, New York University, 1957. University Microfilms, Ann Arbor, Michigan.
2. “A Study of the Relationships Between Mental Rigidity, Science Achievement, and Intelligence in Intermediate-Grade-School Children.” Unpublished Ed.D. dissertation. The State College of Washington, 1954.
3. An Analysis of a Form of the Water Jar Test
4. Intellectual rigidity and social attitudes.
5. “A Study of the Relationships Among Several Measures of Rigidity.” Unpublished Ph.D. dissertation. State University of Iowa, 1952. University Microfilms, Ann Arbor, Michigan.