Factor analysis was used to summarize the interrelationships between a large and varied collection of measures. Data for 500 third grade students assigned to either an experimental or a comparison condition were obtained. The data covered scores for the first 28 items of the Student Affective Behavior Checklist, (2) 9 nonmathematics subtests of the Iowa Tests of Basic Skills-Form 4, and (3) 11 subtests of the Botel Reading Inventory-Form B. Sex, race, IQ (Otis Lennon Mental Ability Test Form K, Level 1), number of siblings, number of school absences, instructional group level, and father's occupational status were also determined. A total of 56 variables were tested. A varimax rotation was performed on the 11 factors extracted using a principal components extraction measure. The results indicate that the groups of variables entering the analysis were generally more related among themselves than to members of other groups. More intensive efforts to determine the nature of and interrelationships between behavioral, achievement, and socioeconomic variables with methodological refinement is recommended. (Author/JS)