We emphasize that this study is preliminary and was
designed to provide some pilot information for further
testing and development of the motivational model. As
such, this study has some significant limitations that
should be considered. Most importantly, our sample was
cross-sectional, which limits our ability to make causal or
directional statements regarding our mediational analyses.
Relatedly, the results of our mediational analyses
would be considered only “partial mediation” by the
traditional approach described in Baron and Kenny.1
However, more recent work in this area emphasizing the
size of the indirect effect (over simple drop in the coefficient)
supports our position of full mediation.35 In
any case, the remaining effects of self-efficacy and perceived
importance on exercise behavior were quite small
after inclusion of patient readiness to change (ie, ’s
.20), suggesting that much of the effects of self-efficacy
on actual exercise behavior is indeed mediated via its
effects on patient motivation.
We emphasize that this study is preliminary and was
designed to provide some pilot information for further
testing and development of the motivational model. As
such, this study has some significant limitations that
should be considered. Most importantly, our sample was
cross-sectional, which limits our ability to make causal or
directional statements regarding our mediational analyses.
Relatedly, the results of our mediational analyses
would be considered only “partial mediation” by the
traditional approach described in Baron and Kenny.1
However, more recent work in this area emphasizing the
size of the indirect effect (over simple drop in the coefficient)
supports our position of full mediation.35 In
any case, the remaining effects of self-efficacy and perceived
importance on exercise behavior were quite small
after inclusion of patient readiness to change (ie, ’s
.20), suggesting that much of the effects of self-efficacy
on actual exercise behavior is indeed mediated via its
effects on patient motivation.
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