Feedback, Fast and Slow: Effect of Live vs. Outcome Feedback

Research Highlights

- Live feedback (provided during the activity) leads to considerably larger savings than outcome feedback with minimal delay

- Outcome takes a while to unfold its effect on resource consumption, whereas the impact of live feedback is immediate and stable over the study period

- The results challenge existing theory and provide novel insights about the behavioral mechanisms of feedback



Feedback interventions have proven to be an effective instrument for behavior change. Prior research states that feedback should be provided in a “timely” manner. Laboratory studies show that, at least in complex tasks, even minimal feedback delays may lead to disastrous consequences. On the other hand, timely feedback may require costly infrastructure that allows for the transmission and storage of large data volumes and increases risks regarding privacy concerns and information overload.



In a two-month randomized controlled trial with 517 Swiss households, we evaluate the impact of two types of activity-specific feedback: Live feedback (provided during the activity) and outcome feedback that is provided with minimal delay right after the activity. More precisely, participants receive feedback on their resource use in the shower. We measure the energy use per shower as dependent variable and explore the underlying behavioral mechanisms.



- Both types of activity-specific feedback induce large savings. Outcome feedback reduces energy use for the target behavior by 14%. With a 23% treatment effect, the impact of live feedback is even larger.

- We provide empirical evidence that contradicts prior research that a) attributes the importance of timeliness to task complexity, b) attributes the impact to the updating of prior perception errors, and c) media richness theory.


Selected publications

Work in progress. 


The research has been funded by Swiss Mobiliar Insurance and the MTEC foundation of ETH Zurich.


Verena Tiefenbeck, Thorsten Staake, Samuel Schöb

Partners: University of Bonn (Lorenz Götte), Swiss Mobiliar Insurance


All projects on Behavioral Interventions

 Overcoming Salience Bias: The Power of Real-Time Feedback at the Point of Use

 Energy Conservation in the Absence of Volunteer Selection Bias and Monetary Incentives

Feedback, Fast and Slow: Effect of Live vs. Outcome Feedback


Moral Licensing: Evidence from a Field Study


Adoption and Usage: Consumer Interaction with Green IS


Hand hygiene in Kindergartens: Understanding the effect of live feedback on hand washing behavior


For further information or if you have any questions please do not hesitate to contact us.