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Abstract
Monetary Contingency Contracts (MCCs) are schemes that ask individuals to pledge money that is returned contingent on behaviour change. In relation to weight loss, this study explored likely levels of engagement with MCCs, how much individuals would be willing to pay into an MCC, and how these amounts vary under different contract conditions. Fifty-six individuals with BMI above 25 who were motivated to lose weight were recruited. The majority of participants (87.5%) indicated that they would be willing to engage with weight loss MCCs, but showed more reluctance to subscribe to pair-based MCCs which offered; (a) refunds contingent on the weight loss of a weight loss partner, and (b) ‘all or nothing refunds’ in which no reward is given for any weight loss below the target weight loss goal. This study provides preliminary evidence that individuals motivated to lose weight may be willing to engage with weight loss MCCs. Further research is needed to explore reasons for reluctance to subscribe to MCCs with certain conditions, to inform the design of future experimental studies testing the efficacy of MCCs as part of an intervention for weight loss.