Comparisons as Predictors of People’s Beliefs about the Importance of Changing Their Health Behaviors

The current study tested relative strengths of different comparison beliefs for predicting people’s self-assessments of whether they should increase their health-relevant behaviors (exercise, sleep, and fruit and vegetable consumption). Comparison beliefs relevant to three standards (perceived global, local, expert standards) were evaluated. Data were combined from three similar studies (total N = 744) that had a cross-sectional, within-subject design. Participants completed importance-of-change scales regarding the three health behaviors and reported comparison beliefs and absolute behavior frequencies/amounts. Results were consistent across the three behaviors. Comparison beliefs predicted ratings of importance of changing one’s behavior, even beyond what is predicted by reports of absolute behavior frequency. Expert comparisons were consistently most predictive above and beyond the absolute estimates and the other comparison standards. There was no evidence of a local dominance effect when examining local versus global comparisons. Comparison beliefs have unique utility for predicting people’s perceived importance of changing their heath behavior. The fact that expert comparisons were consistently most predictive (and local comparisons the least) may have implications for interventions designed for encouraging behavior change.