The purpose of Project GRAD (Graduate Ready for Activity Daily) was to evaluate a generalizable intervention to promote adoption and maintenance of physical activity among young adults transitioning from university to adult roles. The study, which was conducted from 1993 to 1997, improved on previous research by assessing longer-term outcomes of both physical activity and theoretically derived mediators, and the relation between the two. The survey assessed physical activity and numerous theory-based psychosocial and environmental mediators.
Calfas, K.J., Sallis, J.F., Lovato, C.Y., and Campbell, J. (1994). Physical activity and its determinants before and after college graduation. Medicine, Exercise, Nutrition, and Health, 3, 323-334.
Sallis, J.F., Johnson, M.F., Calfas, K.J., Caparosa, S., and Nichols, J. (1997). Assessing perceived physical environment variables that may influence physical activity. Research Quarterly for Exercise and Sport, 68, 345-351.
Sallis, J.F., Calfas, K.J., Alcaraz, J.E., Gehrman, C., and Johnson, M.F. (1999). Potential mediators of change in a physical activity promotion course for university students: Project GRAD. Annals of Behavioral Medicine, 21, 149-158.
Calfas, K.J., Sallis, J.F., Nichols, J.F., Sarkin, J.A., Johnson, M.F., Caparosa, S., Thompson, S., Gehrman, C.A., and Alcaraz, J.E. (2000). Project GRAD: Two-year outcomes of a randomized controlled physical activity intervention among young adults. American Journal of Preventive Medicine, 18, 28-37.
Intraclass correlations computed for 63 summary scores and 7 single items on the Project GRAD Health Assessment Survey. For relatively low correlations, data were checked for data entry accuracy and presence of outliers. In the few instances in which outliers were present, they were replaced with mean values and the test-retest correlations recomputed.