An experimental paradigm for studying sense of agency in joint human–machine motor actions

Dubynin, I.A.; Yashin, A.S.; Velichkovsky, B.M.; Shishkin, S.L.

Авторы: Dubynin Ignat A., Yashin Artem S., Velichkovsky Boris M., Shishkin Sergei L.
Журнал: Experimental Brain Research
Том: 239
Номер: 6
Год издания: 2021
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 1951
Последняя страница: 1961
DOI: 10.1007/s00221-021-06105-9
Аннотация: In this paper we propose an experimental technique for studying sense of agency (SoA) in joint human-machine actions. This technique is based on the use of an electromechanical finger-lifting device that enables a joint motor action initiated by a participant and completed by the machine. The joint action, later referred to as an “active-passive” action, was implemented as a reaction time task and contrasted with other levels of participant’s involvement, including active movement, passive movement and observation of a dummy’s movement. In each trial, a feedback sound signal informed the participant whether they had performed the task successfully, i.e. faster than a threshold, which was individually adjusted in the beginning of the experiment. In the active condition the result depended on the participant, while in other conditions it was preprogrammed for the servo. In context of this task, we studied direct time estimates made by participants and auditory event-related potentials (ERP) in 20 healthy volunteers. Amplitude of the auditory N1 component in the responses to the feedback sound showed no significant effect of activity and success factors, while its latency was shorter in successful trials. Interaction of activity and success factors was significant for subjective time estimates. Surprisingly, the intentional binding effect (subjective compression of time intervals, which is known as a correlate of SoA) only emerged in trials of active condition with negative results. This observation was in contrast with the fact that the active and active-passive movements were both voluntarily initiated by the participant. We believe that studying SoA with the proposed technique may not only add to the understanding of agency but also provide practically relevant results for the development of human-machine systems such as exoskeletons.
Добавил в систему: Яшин Артем Сергеевич

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An experimental paradigm for studying sense of agency in joint human–machine motor actionsстатья