Zheng Ran, Maraj Brian K V
Faculty of Kinesiology, Sport, and Recreation, University of Alberta, 4-245 Van Vliet Complex, Edmonton, AB, T6G 2H9, Canada.
Exp Brain Res. 2018 Jul;236(7):1953-1962. doi: 10.1007/s00221-018-5276-5. Epub 2018 Apr 27.
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.
在许多活动中，我们需要预测被遮挡物体的到达。这个动作被称为预测运动或运动外推。先前的研究人员发现，眼动追踪和内部计时模型都参与了预测运动任务。此外，有报道称，在跟踪任务中，即使目标被遮挡，同时进行的手部运动也有助于对外部生成目标的眼动追踪。本研究考察了同时进行的手部运动对预测运动任务中估计接触时间的影响。我们发现，不同（准确/不准确）的同时进行的手部运动对预测运动任务中的眼动追踪准确性和估计的接触时间有相反的影响。也就是说，准确的同时进行的手部追踪提高了眼动追踪准确性，并有提高估计接触时间精度的趋势，但不准确的同时进行的手部追踪降低了眼动追踪准确性，并干扰了估计的接触时间。然而，眼动追踪准确性并不能决定估计接触时间的精度。
