Upon becoming members at a community gymnasium, 55 women were randomly assigned to one of three groups: control, self-monitoring of gym attendance, or self-monitoring of attendance plus extra staff attention. The effect of these interventions on gym attendance over 3 months was examined. A 3 X 4 (Group X Time Phase, first 3 weeks to last 3 weeks) ANOVA indicated that the main effects for group and time predicted attendance at the gym. Attendance during the first 3 weeks was significantly greater than attendance thereafter. The control subjects attended significantly less than the self-monitoring subjects at all phases. Further research is suggested toward using self-monitoring, staff support, and periodic progress feedback for increasing program adherence. In addition, self-motivation and body fat percent were assessed initially. Correlations between these two variables and attendance failed to support their usefulness as predictors at any time phase.
Jo Weber and Eleanor H. Wertheim are with the Department of Psychology, La Trobe University, Bundoora, Victoria 3083, Australia. This paper was based on the first author's honor's thesis.