Titre: “What can Music Making teach us about Joint Actions?" Abstract: From simple tapping to ensemble performances, joint music making is a great tool to investigate cognitive mechanisms of social cognition. Besides providing potentially engaging paradigms that combine ecological validity with experimental control, practices of joint music making can also help to identify discrepancies between current theories of joint action and the possibilities of real-life interactions. I will present studies that are designed to investigate some of these discrepancies to gain a better understanding of temporal coordination in human interactions.