title: Selective visual scaling of time-scale processes facilitates broadband learning of isometric force frequency tracking.
abstract: 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.
authors.affiliation: Health and Exercise Science Department, Truman State University, 2120 Pershing Building, Kirksville, MO, 63501, USA. aking@truman.edu.
authors.forename: Adam C
authors.initials: AC
authors.lastname: King
authors.affiliation: Department of Kinesiology, University of Georgia, G10 Aderhold Hall, Athens, GA, 30602, USA.
authors.forename: Karl M
authors.initials: KM
authors.lastname: Newell
mesh_terms: D056228:Feedback, Sensory; D005260:Female; D006801:Humans; D007537:Isometric Contraction; D007858:Learning / Q000502:physiology*; D008297:Male; D011597:Psychomotor Performance; D013647:Task Performance and Analysis; D055815:Young Adult
keywords: Isometric force; Motor learning; Time scales; Visual information