This study aims to explore leadership characteristics and contribute evidence to the validity of Jungian personality typology by investigating the relationship between principals' personality types and their reported problem-solving strategies. To test the hypothesis that the manner in which the principals report that they would solve a problem would be characteristic of their psychological types, the Myers-Briggs Type Indicator (MBTI) and the Principal Problem Strategy Questionnaire (PPSQ) were administered to 86 principals. The MBTI was scored for preferences in perceiving (sensing or intuitive) and judging (thinking or feeling) functions to generate a psychological type score. The PPSQ consists of 12 problem situations for which principals described what action they themselves would take. Answers to the PPSQ were coded for the respondent's psychological type functions based on MBTI results, and six Q-sorters independently classified PPSQ responses by characteristics of psychological types. Results indicate that perceived problem-solving strategies of sensing and intuitive type and thinking and feeling type principals are significantly different, and that the principals studied overwhelmingly perceived and judged problem situations according to their psychological type characteristics. It is concluded that if reported strategies reflect actual strategies, psychological type is a major determinant of leader behavior. (MLF)