The head fake in basketball is a scenario in which a basketball player passes the ball in one direction (e.g., to the right) while turning the head in the opposite direction (e.g., to the left). As the head orientation conflicts with the perceived pass direction, responses to passes with head fakes are slower and more error prone than responses to passes without head fakes (head-fake effect; Kunde et al., 2011). Interestingly, players performing a head fake in lab studies without a opposing player showed response-response incompatibility costs, evident in higher initiation times and error rates (Güldenpenning et al., 2023), as s/he must execute a passing movement in one direction while turning the head into the contrary direction. The current study investigated if the fake production costs are increased by the presence of a social partner. Such social costs can occur as the person who performs a deceptive action violates the social rule to not deceive another person (Foerster et al., 2019). Moreover, monitoring the consequences intended by a deception might also produce costs (Wirth et al., 2018). Accordingly, we predict that the fake production costs are higher with the intention to deceive a social partner (i.e., in a social scenario) as compared to when a participant performs the movement on his/her own (i.e., in an individual scenario). We will compare the initiation times and error rates of the attacking player between the social scenario with a defending player (opponent) and the individual scenario without a defending player.