Internality vs Externality and Personal Adjustment: A Factor Analytic Study
This study compared three tests to determine the degree to which they might be measuring a single construct: Rotter's Internal-External Reinforcement Scale, Rest's adaptation of Kohlberg's test of moral development, and selected scales from Shostrom's Personal Orientation Inventory. All three scales were expected to show positive relationships with a measure of personal adjustment, the Tennessee Self-concept Scale. Numerous significant correlations were found among these instruments, suggesting some commonality in the personality dimensions being measured. There were enough differences to suggest continued refinement and to mitigate against substitution of one test for another without loss of information.