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Journal Article

Twin peaks: An ERP study of action planning and control in co-acting individuals

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Prinz,  Wolfgang
Department Psychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Wascher,  Edmund
Max Planck Research Group Cognitive Psychophysiology of Action, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Prinz_TwinPeaks.pdf
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Citation

Sebanz, N., Knoblich, G., Prinz, W., & Wascher, E. (2006). Twin peaks: An ERP study of action planning and control in co-acting individuals. Journal of Cognitive Neuroscience, 18(5), 859-870. doi:10.1162/jocn.2006.18.5.859.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-E62F-B
Abstract
Previous studies have shown that perceiving another's actions activates corresponding representations in an observer's action system. The present study investigated how performing a task with another person affects action planning and control. Reaction times (RTs) and event-related potentials were measured while participants performed a go/no-go task alone and with another person. Three effects of acting together were observed. First, RTs were slowed when individuals had to respond to a stimulus referring to the other's action, suggesting that an action selection conflict occurred. Second, at frontal sites, a stimulus referring to the other's action elicited a similar electrophysiological response as a stimulus referring to one's own action. Finally, on no-go trials, P300 amplitude was significantly larger in a group setting, indicating that an action was suppressed. These findings provide evidence that individuals acting in a social context form shared action representations.