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ERIC Number: EJ932347
Record Type: Journal
Publication Date: 2010-Dec
Pages: 10
Abstractor: As Provided
Reference Count: 30
ISBN: N/A
ISSN: ISSN-0096-1523
Bi-Stability of Movement Coordination as a Function of Skill Level and Task Difficulty
Liu, Yeou-Teh; Mayer-Kress, Gottfried; Newell, Karl M.
Journal of Experimental Psychology: Human Perception and Performance, v36 n6 p1515-1524 Dec 2010
This study investigated whether the level of practice interacts with the initial conditions (here manipulated as preparatory movements) and task difficulty (ball angular velocity and friction) in determining the stability of movement coordination for a roller ball motor task. Practice level and task difficulty were manipulated as two control parameters that theoretically were hypothesized to change the threshold for the transition between task success and failure. The findings showed bi-stability and hysteresis in the coordination mode as a manifestation of dependence on the initial conditions. The transition from failure to success in the roller ball task as a function of practice time can be modeled as a saddle-node bifurcation corresponding to a first order phase transition. It is proposed that task difficulty acts as a control parameter that is a dual to skill level and that also effectively compensates for practice time. (Contains 1 table and 11 figures.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org/publications
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Taiwan