Overcrowded residence halls at Rutgers University form the basis for this research study on the effects of overcrowding. Subjects were the occupants of 31 rooms (7 triple male rooms, 7 triple female rooms, 7 double male rooms, and 10 double female rooms). Two sets of measures were used to determine whether crowding caused arousal and stress. The first set involved the measurement of unbound cortisol obtained from urine samples. The second set of measures involved cognitive performance. Results indicate that crowding causes more negative effects on women than on men. (Author/HMV)