1. Development and Preliminary Analysis of a New Q-Sort Type of Leadership Test;Carp;The American Psychologist,1957
2. Combining Criterion Measures from R- and Q-methodologies for Purpose of Validating Tests Related to Leadership;Cassel;The American Psychologist,1957
3. Comparing the Pre- and Post-Training Leadership Test Scores With Norms for Colonels and Federal Prisoners, and With Other Test Scores;Cassel;The American Psychologist,1958
4. The Discrimination of Two Racial Samples;Horst;Psychometrika,1950
5. Psychotherapy: theory and research.