Fig. 1.

[A] Schematic drawing of experimental setup. [B] Time-course of a trial. After a fixation cross the pre-cue provided advance information about the joint configuration to be performed, the individual action to be performed, both, or neither. The pre-cue was followed by a blank screen. A Go signal that fully specified the joint configuration and the individual actions indicated to the participants to perform the action with the partner as quickly as possible. [C] Examples of pre-cues for each of the four experimental conditions. From Left to Right: I+We+: Specification of individual action (palm facing outwards) and of joint configuration (partner will perform same action). I+We-: Specification of individual action (palm facing inwards) but not of joint configuration. I-We+: No information regarding individual action, but specification of joint configuration (partner will perform different action). I-We-: No information regarding individual action or joint configuration.