Investigating Rewards and Deposit Contract Financial Incentives for Physical Activity Behavior Change Using a...

Area of Science:

• Behavioral Economics
• Health Psychology
• Exercise Science

Background:

• Financial incentives are effective for increasing physical activity but can be costly.
• Deposit contracts, where participants pledge their own money, offer a potentially affordable alternative.
• Deposit contracts may leverage loss aversion for enhanced effects, though previous research often used loss framing with rewards instead of actual deposits.

Purpose of the Study:

• To differentiate the effects of actual financial loss (deposit contracts) versus loss framing.
• To compare the effectiveness and uptake of deposit contracts against financial rewards.
• To evaluate incentive effectiveness versus a no-incentive control and the impact of gain versus loss framing.

Main Methods:

• A 20-day physical activity intervention involving 126 healthy participants (mean age 22.7 years).
• Participants used a smartphone app with personalized goals, receiving either a €10 deposit or reward, with feedback framed as gain or loss.
• A between-subjects factorial design compared incentive type (deposit vs. reward) and feedback frame (gain vs. loss) against a no-incentive control.

Main Results:

• Financial incentives significantly increased goal achievement days compared to the control group (13.10 vs. 8.00 days).
• Deposit contracts had significantly lower uptake (62%) than rewards (100%).
• Deposit contracts were not significantly more effective than rewards, and loss frames were less effective than gain frames (10.50 vs. 14.67 days).

Conclusions:

• While financial incentives improve physical activity, deposit contracts do not offer superior effectiveness over rewards, despite lower cost.
• Low uptake of deposit contracts presents a significant barrier to widespread adoption.
• Loss framing was unexpectedly less effective than gain framing, suggesting a need for further research before practical application.