Fig. 3

Results from our two-sided z-test scores comparing each of the three intervention groups against the control group indicate that those in the control group switched on their HumBug sensors more than those in the three intervention groups. The p-values indicate if a particular week in either of the three intervention groups had significantly more ‘1s’ (i.e., they switched on their HumBug sensors that week) than the control group. The red bars in the figure indicate p > 0.95, implying that the participants in the control group had significantly more ‘1s’ than those in the three intervention groups. The green bars (present only at weeks 13 and 14 in the ‘Monetary incentives only’ chart), represent p < 0.05, meaning that the participants in the intervention group had significantly more ‘1s’ than those in the control group. The * markers are placed on top of the bars encoded in red and green to indicate that these findings are statistically significant (p < 0.05 or p > 0.95 under a two-sided z-test). The blue bars represent data being within the two-sided z-test critical values [0.05, 0.95], enabling observation of any trends, but the values are not statistically significant