This thesis proposes three hypotheses: first, that persons with a high generalized expectancy for internal control of reinforcement will react to many of life's situations in a problem-solving or need-persistent way; second, that those persons high in the belief of external control will be more extra-punitive in their reactions to frustrating situations; third, that persons with a high belief in internal control of reinforcement are more ready to learn in chance situations.

The purpose of this study is to investigate the relationship between personality and certain characteristics of decision-making behavior in a modified two-choice probability learning situation. More specifically, this study addresses itself to the following questions: (1) Can personality correlates of the decision-making process be demonstrated? (2) Are personality factors related to individual differences in maximizing tendency, risk-taking, and decisiveness? (3) If such relationships, exist, who do they fit into the framework of existing decision-making theory?