The ability to distinguish between an individual's own actions and those of another person is a requirement for successful joint action, particularly in domains such as group music making where precise interpersonal coordination ensures perceptual overlap in the effects of co-performers' actions. We tested the hypothesis that such coordination benefits from simultaneous integration and segregation of information about ‘self’ and ‘other’ in an experiment using a musical joint action paradigm. Sixteen pairs of individuals with little or no musical training performed a dyadic synchronization task on a pair of electronic music boxes. The relationship between pitches produced by paired participants (same vs. different) and the relationship between movement frequencies required to trigger synchronous tones (congruent vs. incongruent) were varied in a repeated measures design. The results indicate that interpersonal coordination was most accurate when sounds were different in pitch but movement frequency was congruent. Under other conditions, participants often drifted apart, resulting in poor coordination, especially with same sounds and incongruent movements across co-performers. These findings suggest that interpersonal coordination was facilitated when simultaneous self-other integration and segregation occurred across sensory modalities in an asymmetrical manner where pitch relations favoured segregation via auditory streaming while movement congruence favoured integration via visuo-motor coupling. Such self-other representational balance may enable co-performers to maintain autonomous control while attending, anticipating, and adapting to each other's timing when joint action requires precise temporal coordination.

区分一个人自己的行为和另一个人的行为的能力是成功的联合行动的必要条件，特别是在团体音乐制作等领域，精确的人际协调确保了共同表演者行动效果的感知重叠。我们在使用音乐联合动作范式的实验中测试了这样的假设，即这种协调受益于关于“自我”和“他人”的信息的同时整合和分离。16 对几乎没有受过音乐训练的人在一对电子音乐盒上执行了二元同步任务。配对参与者产生的音高之间的关系（相同或不同）与触发同步音调所需的移动频率之间的关系（全等与非同步）不一致）在重复测量设计中有所不同。结果表明，当声音的音高不同但动作频率一致时，人际协调最准确。在其他情况下，参与者经常疏远，导致协调性差，尤其是在共同表演者之间出现相同的声音和不一致的动作时。这些发现表明，当同时自我-其他整合和分离以不对称的方式跨感官模式发生时，人际协调得到促进，其中音高关系有利于通过听觉流进行分离，而运动一致性有利于通过视觉-运动耦合进行整合。这种自我-他人表征平衡可以使合作者在参与、预测和适应彼此的同时保持自主控制”