Abstract
Congruent visual feedback increases perceived duration of hand action. Action-outcome congruence is fundamental to sense of agency and contributes to time distortion. We therefore hypothesized that sense of agency over visual feedback of the moving hand would increase perceived duration of action. Participants moved their hand to imitate models of hand poses. To manipulate sense of agency, we provided video feedback of their hand movement, with spatio-temporal biases (spatial: upright or inverted; temporal: 50-1500 ms delays). Participants then judged whether the video was of short or long duration in comparison with videos presented in previous trials. They also reported whether they felt in control of the hand movement in the video. Delayed videos were judged as “short” and “no agency” more frequently than synchronous videos. Results showed subjective time contraction caused by delayed visual feedback of hand action, suggesting that sense of agency modulates time perception during action.
