Motor learning during social interaction: the role of social interdependence

Motor learning has mostly been studied in laboratory settings where participants execute the task alone, unlike in real life, where people perform activities together with others. Recent discovery of mirror neuron system (MNS)linking perception of others' actions and execution of our ownmakes the scarcity of studies on social aspects of motor learning even more peculiar. Here, we investigated motor learning during interaction with a partner. Participants engaged in 2 consecutive sessions executing the task alone or in pairs. We found that social interaction improved motor performance only when participants had prior individual experience with the task. This effect was amplified if subjects could first observe their partners' actions, suggesting that it may be mediated by prior MNS configuration.