Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards.

Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards. Behav Med. 2019 Apr 11;:1-11 Authors: Phillips CB, Hurley JC, Angadi SS, Todd M, Berardi V, Hovell MF, Adams MA Abstract Financial incentives can increase physical activity (PA), but differences in the immediacy of reward delivery and individual differences in delay discount rates (i.e., higher discount values associated with less tolerance for delayed rewards) may explain differential responding. The current study tested whether delay discount rate moderated the relative effectiveness of immediate financial rewards on increasing daily PA. Inactive, overweight adults (ages 18-60, Nā€‰=ā€‰96) were randomized to receive either smaller, immediate goal-contingent rewards or larger, delayed rewards for participation. Delay discount rates were derived for those who completed the Monetary Choice Questionnaire (Nā€‰=ā€‰85). Linear mixed models tested interactions between discount rate and intervention arm on changes in mean daily Fitbit-measured steps from baseline to intervention phases, and rates of change during the intervention phase. Across all groups, participants increased by 2258 steps/day on average from baseline to intervention and declined by 9 steps/day across the 4-month intervention phase. The mean increase in daily steps was greater for immediate reward-arm participants across all discount rates. Descriptive exploration of reward effects ...
Source: Behavioral Medicine - Category: Psychiatry Authors: Tags: Behav Med Source Type: research
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