A meta-analytic investigation of the role of reward on inhibitory control

Sam Burton*, GRAEME KNIBB, Andrew Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Contemporary theories predict that inhibitory control (IC) can be improved when rewards are available for successfully inhibiting. In non-clinical samples empirical research has demonstrated some support; however, “null” findings have also been published. The aim of this meta-analysis was to clarify the magnitude of the effect of reward on IC and identify potential moderators. A total of 73 articles (contributing k=80 studies) were identified from PubMed, PsycInfo, and Scopus, published between 1997 and 2020, using a systematic search strategy. A random effects meta-analysis was performed on effect sizes generated from IC tasks, which included rewarded and non-rewarded inhibition trials. Moderator analyses were conducted on clinical samples (vs “healthy controls”), task type (go/no-go vs stop signal vs
Flanker vs Simon vs Stroop vs Anti-saccade), reward type (monetary vs points vs other), and age (adults vs children). The prospect of reward for successful inhibition significantly improved IC (SMD=0.429, 95% CI=0.288, 0.570, I
2=96.7%) compared with no reward conditions/groups. This finding was robust against influential cases and outliers. The significant effect was present across all IC tasks. There was no evidence of the effect moderated by type of reward, age, or clinical samples. Moderator analyses did not resolve the considerable heterogeneity. The findings suggest that IC is a transient state that fluctuates in response to motivations driven by reward. Future research might examine the potential of improving IC through rewards as a behavioural intervention.
Original languageEnglish
Pages (from-to)1818-1828
Number of pages11
JournalQuarterly Journal of Experimental Psychology
Volume74
Issue number10
Early online date12 Apr 2021
DOIs
Publication statusE-pub ahead of print - 12 Apr 2021

Keywords

  • motivation
  • reward
  • inhibitory control
  • stop signal
  • go/no go

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