"Optimal" Feedback Use in Crowdsourcing Contests: Source Effect and Priming Intervention
Abstract
Crowdsourcing contests allow firms to seek ideas from external solvers to address their problems. This research examines solvers’ use of developmental feedback from different sources and of different constructiveness when generating ideas in contests. I theorize a source effect in solvers’ feedback use where they use seeker feedback more than peer feedback, even if both give identical suggestions for their ideas. I also show how the source effect affects solvers’ use of constructive and less constructive feedback from the respective sources. An insight is that compared with their use of peer feedback, solvers’ use of seeker feedback is more extensive at any level of, but less sensitive to, feedback constructiveness. An implication is that solvers may underuse constructive peer feedback and overuse less constructive seeker feedback. Such behaviors can be solver optimal (in terms of improving solvers’ winning prospects) but not seeker optimal (in terms of enhancing ideas for seekers’ problems), as constructive feedback is likely to improve idea quality, whereas less constructive feedback may hurt it. I propose a priming intervention of a feedback evaluation mechanism to mitigate the source effect in solvers’ feedback use—in a way, the intervention can cause solvers to behave more optimally for the seekers. A field survey and three online experiments test the theorizing and proposed intervention. I discuss the contributions and implications of this research for various stakeholders in crowdsourcing contests.
Study specs
The study involved a field survey and three online experiments to test the theorized source effect and the proposed feedback evaluation intervention.
- Authors
- TK Koh
- Institution
- University of North Carolina Chapel Hill
- Discipline
- Behavioral Science
- Study Type
- experiment|survey
- Year
- 2025
- Human Data Platform
- Prolific
- Source
- View Source Google Scholar
Measured Outcomes
Solvers' feedback usage patterns, the source effect of feedback (seeker vs. peer), and the influence of feedback constructiveness on idea quality and solvers’ winning prospects.
Peer Review & Critical Discussion
Potential Selection Bias in 2023 Cohort
The participant pool shows a concerning overrepresentation of users from high-income demographics. Looking at Table 3, we can see that 78% of respondents had annual incomes above $75k, which significantly limits the generalizability of these findings to broader populations.
Non-naive Participants Issue
I've noticed a methodological concern regarding participant naivety. Given that Prolific users often complete multiple studies, there's a real risk that participants had prior exposure to similar experimental paradigms, which could confound the results.
RLHF Applicability to This Study Design
The implications for RLHF training pipelines are understated. If we accept the authors' conclusions about preference stability, this has direct consequences for how we should structure reward model training. The temporal decay effect described in Section 4.2 is particularly relevant.
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