The relationships among the IMB model constructs were estimated using AMOS 17.0, a
structural equation modeling program. The estimated models correspond to the IMB model
as initially described (J. D. Fisher & Fisher, 1992), and as illustrated in the Appendix. All
paths indicated in the IMB model, except for the model’s proposed feedback loop from
health outcomes back to information and motivation, were estimated in separate models for
diet and exercise, as the two behaviors are not assumed to be necessarily related. All
analyses were conducted with the correlation matrix generated by 118 cases. There was no
missing data and the sample size was considered to be of adequate power to detect medium
effects (Kline, 2004; Loehlin, 1992).