Figure 2.

Average number of steps registered weekly across the study. Filled symbols refer to participants randomized to the monitoring plus reinforcement thinning condition during the Randomization phase, and unfilled symbols refer to participants randomized to the monitoring-only condition during the Randomization phase; all participants received reinforcement during the FI monitoring plus reinforcement phase. Values represent group means collected each week, but not all participants provided data at each week during the Randomization phase. During the Randomization phase, participants met with research staff on average 4 visits during the first four week period (weeks 4–7), on average twice during the second four week period (weeks 8–11), and on average once during the last four week period (weeks 12–15). See text for further details. BL = Baseline