Title

Differential time scales of change to learning frequency structures of isometric force tracking

Document Type

Article

Journal/Book Title/Conference

Journal of Experimental Psychology: Human Perception and Performance

Volume

40

Issue

4

Publisher

American Psychological Association

Publication Date

8-1-2014

First Page

1629

Last Page

1640

DOI

10.1037/a0037113

Abstract

Multiple processes support the persistent (learning) and transient (adaptive) change in behavior over time. We investigated whether practice and rest influence similarly the learning and adaptation of slow and fast frequency structures in isometric force tracking of pathways that varied in their regularity. Participants practiced 25 trials on each of 5 days in either a constant force target or 1 with the 1/f distributional properties of brown or pink noise. There was a reduction in root mean squared error (RMSE) as well as an increasing positive correlation between force output and the target pathway for all noise conditions over days. The spectral frequency analysis of force output and RMSE revealed task dependent outcomes of learning and adaptation as a function of the relatively slow (0–4 Hz) and fast (8–12 Hz) oscillatory time scales. These contrasting findings show that the persistent and transient properties of learning occur across different timescales and dimensions of behavior (force output and outcome-RMSE).

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