AS A FIRST STEP IN A STUDY OF THE ROLE OF ATTITUDE AND ATTITUDE CHANGE AS A VARIABLE IN THE INTERACTION BETWEEN BASIC LITERACY TEACHERS AND THEIR ADULT STUDENTS, A GENERAL PROCEDURE FOR THE CLASSIFICATION OF ATTITUDES BY DETECTING "ATTITUDE CLUSTERS" WAS DEVELOPED. THIS REPORT DISCUSSES HOW THE MEMBER COMPONENTS OF CLUSTERS MAY BE REPRESENTED AS A SIMPLE CLOSED STRUCTURE CALLED A CIRCUMPLEX. CLUSTER ANALYSIS AND THE CONSTRUCTION OF A CIRCUMPLEX WERE USED WITH GROUP DATA OBTAINED FROM A CLASS OF 23 YOUNG NEGRO WOMEN TEACHER TRAINEES IN ADULT BASIC EDUCATION. THIS METHOD IS ALSO APPROPRIATE FOR INTENSIVE STUDY OF A SINGLE SUBJECT. EACH TRAINEE COMPLETED A 100-ITEM ATTITUDE SCALE AT THE BEGINNING OF A 1-WEEK ORIENTATION AND TRAINING COURSE, AND AGAIN AT THE END OF THE COURSE. RESPONDENTS' JUDGMENT FOR EACH ITEM WAS MADE ON A SEVEN-POINT BI-POLAR "TRUE OR FALSE" SCALE, WITH INTERVALS NUMBERED CONSECUTIVELY FROM ONE THROUGH SEVEN. THIS REPORT INCLUDES THE ATTITUDE SCALE USED AND CIRCULANT CORRELATION MATRICES, AND DISCUSSIONS ON THE DETECTION OF CLUSTERS AND THE CONSTRUCTION OF THE CIRCUMPLEX. (AJ)