A study was conducted to determine whether there is a relationship between the psychological types of copywriting students and performance in a copywriting class. The goal was to develop a program of instruction which would systematically alter psychological makeup in a constructive manner to enable students to become better copywriters. Subjects, 23 college students (mostly seniors) in a copywriting class, were given the Myers-Briggs Type Indicator test. Students were then ranked according to their final grades, and psychological types and ranks in each type category were then averaged. Findings indicate the following: (1) high achievers are introverted and intuitive; (2) when all factors are taken into consideration by summarizing the averaged ranks of performance of groups, the highest score is made by the introverted sensing category; and (3) two types of copywriter are most productive--one is creative, the other is analytical, pragmatic, and dependable. (Two figures and eight notes are included; four appendixes containing the course description, a sample of "copy," a list of students' psychological types, a list of creative persons' psychological types, and 16 references are attached.) (MS)