To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity

Rohde M, Ernst MO (2013)
Frontiers in Psychology 3.

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Journal Article | Published | English
Abstract
Studies on human recalibration of perceived visuo-motor simultaneity so far have been limited to the study of recalibration to movement-lead temporal discrepancies (visual lags). We studied adaptation to both vision-lead and movement-lead discrepancies, to test for differences between these conditions, as a leading visual stimulus violates the underlying cause-effect structure. To this end, we manipulated the temporal relationship between a motor action (button press) and a visual event (flashed disk) in a training phase. Participants were tested in a temporal order judgment task and perceived simultaneity (PSS) was compared before and after recalibration. A PHANToM©force-feedback device that tracks the finger position in real time was used to display a virtual button. We predicted the timing of full compression of the button from early movement onset in order to time visual stimuli even before the movement event of the full button press. The results show that recalibration of perceived visuo-motor simultaneity is evident in both directions and does not differ in magnitude between the conditions. The strength of recalibration decreases with perceptual accuracy, suggesting the possibility that some participants recalibrate less because they detect the discrepancy. We conclude that the mechanisms of temporal recalibration work in both directions and that there is no evidence that they are asymmetrical around the point of actual simultaneity, despite the underlying asymmetry in the cause-effect relation.
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Article Processing Charge funded by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University.
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Rohde M, Ernst MO. To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity. Frontiers in Psychology. 2013;3.
Rohde, M., & Ernst, M. O. (2013). To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity. Frontiers in Psychology, 3.
Rohde, M., and Ernst, M. O. (2013). To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity. Frontiers in Psychology 3.
Rohde, M., & Ernst, M.O., 2013. To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity. Frontiers in Psychology, 3.
M. Rohde and M.O. Ernst, “To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity”, Frontiers in Psychology, vol. 3, 2013.
Rohde, M., Ernst, M.O.: To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity. Frontiers in Psychology. 3, (2013).
Rohde, Marieke, and Ernst, Marc O. “To lead and to lag - forward and backward recalibration of perceived visuo-motor simultaneity”. Frontiers in Psychology 3 (2013).
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