This study examined the effect on GPA of increased occupancy of double dormitory rooms. Seven groups of 50 students each were randomly selected: Group (1) freshmen, two per room; (2) freshmen, three per room; (3) freshmen living off campus, (4) seniors, two per room; (5) seniors, three per room; (6) seniors living off campus; (7) seniors in fraternity or sorority houses. First-term GPA's for all students were recorded. A one-tailed analysis of variance was computed for each group. A significant difference was revealed among the senior groups; multiple t-tests were computed for each independent group. Tables show the computation of the analyses and the t-tests. The t-tests for the seniors showed that Group 4 differed significantly from Group 5, 6, and 7, but that these did not differ significantly from one another. Group 4 achieved a higher GPA than the other three senior groups. The freshman t-tests showed no significant difference. Although Group 1 had a higher GPA than Group 2, and Group 2 than Group 3, the difference between any two of them was not statistically significant. Other factors that no doubt influence the GPA (student homogeneity, roommate compatability, favorable study conditions, past academic success, beneficial residual of attrition, increased motivation) should be studied further, examining more students over a longer period of time. The statistical formulas and the printouts for the various computations are appended. (HH)