King Adam C, Newell Karl M
Health and Exercise Science Department, Truman State University, 2120 Pershing Building, Kirksville, MO, 63501, USA.
Department of Kinesiology, University of Georgia, G10 Aderhold Hall, Athens, GA, 30602, USA.
Atten Percept Psychophys. 2015 Oct;77(7):2507-18. doi: 10.3758/s13414-015-0936-z.
The experiment investigated the effect of selectively augmenting faster time scales of visual feedback information on the learning and transfer of continuous isometric force tracking tasks to test the generality of the self-organization of 1/f properties of force output. Three experimental groups tracked an irregular target pattern either under a standard fixed gain condition or with selectively enhancement in the visual feedback display of intermediate (4-8 Hz) or high (8-12 Hz) frequency components of the force output. All groups reduced tracking error over practice, with the error lowest in the intermediate scaling condition followed by the high scaling and fixed gain conditions, respectively. Selective visual scaling induced persistent changes across the frequency spectrum, with the strongest effect in the intermediate scaling condition and positive transfer to novel feedback displays. The findings reveal an interdependence of the timescales in the learning and transfer of isometric force output frequency structures consistent with 1/f process models of the time scales of motor output variability.
该实验研究了选择性增强视觉反馈信息的更快时间尺度对连续等长力跟踪任务学习和迁移的影响，以测试力输出1/f特性自组织的普遍性。三个实验组在标准固定增益条件下或在力输出的中间（4-8赫兹）或高频（8-12赫兹）频率分量的视觉反馈显示中有选择性增强的情况下跟踪不规则目标模式。所有组在练习过程中都降低了跟踪误差，中间缩放条件下的误差最低，其次分别是高缩放和固定增益条件。选择性视觉缩放引起了整个频谱的持续变化，在中间缩放条件下效果最强，并正向迁移到新的反馈显示中。研究结果揭示了等长力输出频率结构学习和迁移中时间尺度的相互依赖性，这与运动输出变异性时间尺度的1/f过程模型一致。
