Updating of sensorimotor communication in an asymmetric alternating joint action task based on real-time learning of interaction differences

By manipulating task and feedback variables, the present study investigated the dynamic impacts of contexts and coordination results on sensorimotor communication pattern, and how sensorimotor communication affects interpersonal motor coordination. The results were as follows. (1) In the no-feedback group, the accuracy of the asymmetric alternating joint action task was significantly higher than that of the baseline task; in the asymmetric alternating joint action task, the accuracy of the feedback group was significantly higher than that of the no-feedback group. (2) Regarding the no-feedback group, compared to the baseline task, in the asymmetric alternating joint action task, information senders showed sensorimotor communication pattern with a gradual increase in the target key DT from T1 to T4. (3) The SNR of the target key DT was larger for the no-feedback group than for the feedback group, both in the baseline task and the asymmetric alternating joint action task. Further analyses revealed that in the asymmetric alternating joint action task, a different sensorimotor communication pattern emerged in the feedback group compared to the no-feedback group, and the variability of the target key DT was significantly larger in the feedback group than in the no-feedback group.本研究通过操控任务与反馈变量，探讨了情境及协调结果对感觉运动沟通（sensorimotor communication）模式的动态影响，以及感觉运动沟通如何影响人际动作协调。研究结果如下： (1) 在无反馈组中，非对称交替式联合动作任务的准确率显著高于基线任务；而在非对称交替式联合动作任务中，反馈组的准确率显著高于无反馈组。 (2) 针对无反馈组，相较于基线任务，在非对称交替式联合动作任务中，信息发送者的感觉运动沟通模式表现为：目标按键的DT从T1至T4逐渐升高。 (3) 无论是基线任务还是非对称交替式联合动作任务，无反馈组的目标按键DT的信噪比（SNR）均高于反馈组。进一步分析显示，在非对称交替式联合动作任务中，反馈组与无反馈组呈现出不同的感觉运动沟通模式，且反馈组的目标按键DT的变异性显著高于无反馈组。