Poster A92, Saturday, March 24, 1:30–3:30 pm, Exhibit Hall C
Effects of sharing goals with others on sense of agency and motor performance
Kazuki Hayashida1, Yuki Nishi1, Michihiro Osumi1, Shu Morioka1; 1Kio university
Goal sharing (GS) with other people influences motor performance (MP) (Takagi, 2017). We hypothesized a sense of agency (SoA) that has been increased by GS would be related to MP. We created an original intentional binding (IB) task to measure SoA and MP and examine our hypothesis. Thirty healthy same-gender pairs participated in the study. Fifteen pairs were placed into the GS group, and other fifteen pairs were grouped into the no-GS group. Both the GS and no-GS groups were asked to stop an object moving in the horizontal direction on a PC display, using the press of a key at the instant when the object arrived at the center of the screen (18 trials × 10 block). The task score was calculated using data describing the distance between the stopped object and the center of the screen. In the GS group, the total scores for each pair of participants were calculated and displayed on the screen, while only the individual scores were displayed in the no-GS group. A beep was sounded several hundred ms after the object was stopped with the key press. The participants estimated the time interval from the key press to the beep, and this estimated time was taken as a surrogate maker of SoA. We found that SoA and MP had higher values in the GS group than no-GS group (p < 0.01), indicating that goal sharing increased SoA and MP. Processes including sharing of goals with others are important for the improvement of MP.
Topic Area: PERCEPTION & ACTION: Motor control