The purpose of the study was to test the Social Cognitive Theory (SCT; Bandura,
2004) for explaining physical activity (PA) in a large population sample of
adults with type 1 or type 2 diabetes. Study objectives: (1) test the fit of the
SCT structure in the total sample, and the diabetes sub-types; (2) determine
the SCT structural invariance between the type 1 and type 2 groups; and (3)
report explained variance and compare strength of association for the