Proceedings of the Annual Meeting of the Cognitive Science Society

Since its design in 2003, the joint Simon task and corollaryjoint Simon effect (JSE) have been invaluable tools towardsthe study of joint action and the understanding of howindividuals represent the action/task of a co-actor. Thepurpose of this meta-analysis was to systematically andquantitatively review the sizeable behavioural evidence forthe JSE. Google Scholar was used to identify studies citingthe first report of the joint Simon task (Sebanz, Knoblich, &Prinz, 2003) up until June 23, 2015. After screening, thirty-nine manuscripts were included in the meta-analysis, thirteenof which included individual go/no-go (IGNG) control data.Separate random-effects models were conducted for both thejoint Simon and IGNG datasets, and meta-regression modelswere used to assess potential moderators that may impact thestrength of the JSE. The results provide an importantquantitative summary of the literature and serve as afoundation for future research surrounding the JSE.