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The effect of concurrent hand movement on estimated time to contact in a prediction motion task

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Abstract

In many activities, we need to predict the arrival of an occluded object. This action is called prediction motion or motion extrapolation. Previous researchers have found that both eye tracking and the internal clocking model are involved in the prediction motion task. Additionally, it is reported that concurrent hand movement facilitates the eye tracking of an externally generated target in a tracking task, even if the target is occluded. The present study examined the effect of concurrent hand movement on the estimated time to contact in a prediction motion task. We found different (accurate/inaccurate) concurrent hand movements had the opposite effect on the eye tracking accuracy and estimated TTC in the prediction motion task. That is, the accurate concurrent hand tracking enhanced eye tracking accuracy and had the trend to increase the precision of estimated TTC, but the inaccurate concurrent hand tracking decreased eye tracking accuracy and disrupted estimated TTC. However, eye tracking accuracy does not determine the precision of estimated TTC.

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Notes

  1. In the current study, the time of minimum eye velocity after target occlusion was just before the onset time of the anticipatory saccade. Thus, we can regard the time of anticipatory recovery as the onset time of the anticipatory saccade.

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Acknowledgements

The work is supported by the Human Performance Fund, University of Alberta. The authors would like to thank the reviewers for their helpful comments. The authors would also like to thank all of the participants for their willingness to take part.

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Correspondence to Ran Zheng.

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Zheng, R., Maraj, B.K.V. The effect of concurrent hand movement on estimated time to contact in a prediction motion task. Exp Brain Res 236, 1953–1962 (2018). https://doi.org/10.1007/s00221-018-5276-5

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  • DOI: https://doi.org/10.1007/s00221-018-5276-5

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