Adaptation to visual feedback delays in manual tracking: evidence against the Smith Predictor model of human visually guided action
Adaptation to visual feedback delays in manual tracking: evidence against the Smith Predictor model of human visually guided action
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DOI：
10.1007/s00221-005-0306-5
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发表时间：
2006-06-01
影响因子：
2
通讯作者：
Jackson, J. K.
中科院分区：
文献类型：
--
作者：
Miall, R. C.;Jackson, J. K.
我们报告了在手动跟踪任务中对延迟视觉反馈的适应，用频率分析测试了适应响应的性质。两组七名受试者使用手持操纵杆跟踪不可预测的目标，交替进行追踪和补偿显示试验。试验组每天练习1小时，视觉反馈延迟300 ms；对照组在正常不延迟条件下练习。视觉反馈延迟的引入严重破坏了跟踪性能，增加了错误，减少了纠正运动的频率。在为期5天的实验中，受试者表现出明显的适应性，跟踪误差降低，间歇修正的平均功率降低。然而，没有证据表明恢复到最初的高频间歇性跟踪。我们认为，本研究中观察到的自适应反映了预测前馈行为的修改，但这些数据不支持基于Smith预测的控制。
We report adaptation to delayed visual feedback during a manual tracking task, testing the nature of the adapted responses with frequency analysis. Two groups of seven subjects tracked unpredictable targets using a handheld joystick, alternating between pursuit and compensatory display trials. The test group then practised for 1 h per day with a visual feedback delay of 300 ms; the control group practice under normal undelayed conditions. Introduction of the visual feedback delay significantly disrupted tracking performance, with an increase in errors and a reduction in frequency of corrective movements. Subjects showed clear evidence of adaptation during the 5 day experiment, decreasing tracking error and decreasing the mean power of intermittent corrections. However, there was no evidence of a return towards the initial high frequency intermittent tracking. We suggest that the adaptation observed in this study reflects the modification of predictive feedforward actions, but that these data do not support control based on Smith Prediction.