An experimental paradigm for studying sense of agency in joint human–machine motor actionsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 сентября 2021 г.
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.