The study examines the relationship between successful adult teaching and philosophical and personality characteristics as measured by Kreitlow's Check List Distinguishing Among Three Philosophies of Education and Cattell's 16 Personality Factors Questionnaire. The population consisted of 598 teachers of college credit courses to adults in Utah. On the basis of administrator's evaluations 163 "unsuccessful" and 189 "successful" teachers were identified; of these, 75 were randomly selected from each group. Of the three educational philosophies identified in Kreitlow's Check List (progressive, academic, and community) the respondents as individual groups and as a combined total sample agreed with the community philosophy. On Cattell's questionnaire the "successful" teachers were more intelligent and abstract-thinking, more venturesome and socially bold, more tender-minded and sensitive, more experimentally-oriented, more emotionally stable, more forthright and unpretentious, more self-sufficient and resourceful, and older and more experienced. (JR)