Task-Dependent Changes in Visual Feedback Control: A Frequency Analysis of Human Manual Tracking

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Task-Dependent Changes in Visual Feedback Control : A Frequency Analysis of Human Manual Tracking. / Miall, R. C.

In: Journal of motor behavior, Vol. 28, No. 2, 01.01.1996, p. 125-135.

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@article{bef5f557040d4b12a536ec8d37c896f0,
title = "Task-Dependent Changes in Visual Feedback Control: A Frequency Analysis of Human Manual Tracking",
abstract = "Prominent components in the frequency spectrum of human manual tracking responses are thought to reflect the visual feedback control loop and have been used in estimations of the visual feedback loop delay. The frequency structure of human tracking was therefore examined here in two tasks: visually guided tracking of slow and fast pseudorandom targets. Visually related frequency components were identified by testing, in each condition, the effect of adding additional feedback delays on the frequency spectrum. The major frequency components of the responses consisted of a fundamental component and its odd harmonics. These components were related to the visual feedback loop delay and shifted in concert toward lower frequencies as the feedback delay was increased. Furthermore, there were no differences in responses between 3 normal subjects and 1 subject with peripheral sensory loss. This implies that the frequency structure is dominated by the visual feedback control loop, without significant influence from proprioceptive control loops. However, the feedback-loop delay was shown to decrease from around 341 to 264 ms as the task speed doubled. Thus the estimates of visual-feedback delays are influenced by the target being followed, and this suggests that the subjects can “tune” their feedback system to suit the demands of the tracking task.",
keywords = "Feedback delay, Human, Manual tracking, Proprioception, Spectral analysis, Visual feedback",
author = "Miall, {R. C.}",
year = "1996",
month = jan,
day = "1",
doi = "10.1080/00222895.1996.9941739",
language = "English",
volume = "28",
pages = "125--135",
journal = "Journal of motor behavior",
issn = "0022-2895",
publisher = "Taylor & Francis",
number = "2",

}

RIS

TY - JOUR

T1 - Task-Dependent Changes in Visual Feedback Control

T2 - A Frequency Analysis of Human Manual Tracking

AU - Miall, R. C.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - Prominent components in the frequency spectrum of human manual tracking responses are thought to reflect the visual feedback control loop and have been used in estimations of the visual feedback loop delay. The frequency structure of human tracking was therefore examined here in two tasks: visually guided tracking of slow and fast pseudorandom targets. Visually related frequency components were identified by testing, in each condition, the effect of adding additional feedback delays on the frequency spectrum. The major frequency components of the responses consisted of a fundamental component and its odd harmonics. These components were related to the visual feedback loop delay and shifted in concert toward lower frequencies as the feedback delay was increased. Furthermore, there were no differences in responses between 3 normal subjects and 1 subject with peripheral sensory loss. This implies that the frequency structure is dominated by the visual feedback control loop, without significant influence from proprioceptive control loops. However, the feedback-loop delay was shown to decrease from around 341 to 264 ms as the task speed doubled. Thus the estimates of visual-feedback delays are influenced by the target being followed, and this suggests that the subjects can “tune” their feedback system to suit the demands of the tracking task.

AB - Prominent components in the frequency spectrum of human manual tracking responses are thought to reflect the visual feedback control loop and have been used in estimations of the visual feedback loop delay. The frequency structure of human tracking was therefore examined here in two tasks: visually guided tracking of slow and fast pseudorandom targets. Visually related frequency components were identified by testing, in each condition, the effect of adding additional feedback delays on the frequency spectrum. The major frequency components of the responses consisted of a fundamental component and its odd harmonics. These components were related to the visual feedback loop delay and shifted in concert toward lower frequencies as the feedback delay was increased. Furthermore, there were no differences in responses between 3 normal subjects and 1 subject with peripheral sensory loss. This implies that the frequency structure is dominated by the visual feedback control loop, without significant influence from proprioceptive control loops. However, the feedback-loop delay was shown to decrease from around 341 to 264 ms as the task speed doubled. Thus the estimates of visual-feedback delays are influenced by the target being followed, and this suggests that the subjects can “tune” their feedback system to suit the demands of the tracking task.

KW - Feedback delay

KW - Human

KW - Manual tracking

KW - Proprioception

KW - Spectral analysis

KW - Visual feedback

UR - http://www.scopus.com/inward/record.url?scp=0029744349&partnerID=8YFLogxK

U2 - 10.1080/00222895.1996.9941739

DO - 10.1080/00222895.1996.9941739

M3 - Article

AN - SCOPUS:0029744349

VL - 28

SP - 125

EP - 135

JO - Journal of motor behavior

JF - Journal of motor behavior

SN - 0022-2895

IS - 2

ER -