Document Detail


Mutual information in the evolution of trajectories in discrete aiming movements.
MedLine Citation:
PMID:  18510836     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study investigated the mutual information in the trajectories of discrete aiming movements on a computer controlled graphics tablet where movement time ( 300 - 2050 ms) was manipulated in a given distance (100 mm) and movement distance (15-240 mm) in 2 given movement times (300 ms and 800 ms ). For the distance-fixed conditions, there was higher mutual information in the slower movements in the 0 vs. 80-100% trajectory point comparisons, whereas the mutual information was higher for the faster movements when comparing within the 80 and 100% points of the movement trajectory. For the time-fixed conditions, the spatial constraints led to a decreasing pattern of the mutual information throughout the points of the trajectory, with the highest mutual information found in the 80 vs. 100% comparison. Overall, the pattern of mutual information reveals systematic modulation of the trajectories between the attractive fixed point of the target as a function of movement condition. These mutual information patterns are postulated to be the consequence of the different relative contributions of feedforward and feedback control processes in trajectory formation as a function of task constraints.
Authors:
Shih-Chiung Lai; Gottfried Mayer-Kress; Karl M Newell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nonlinear dynamics, psychology, and life sciences     Volume:  12     ISSN:  1090-0578     ISO Abbreviation:  Nonlinear Dynamics Psychol Life Sci     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-05-30     Completed Date:  2008-08-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9704130     Medline TA:  Nonlinear Dynamics Psychol Life Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  241-59     Citation Subset:  IM    
Affiliation:
Department of Physical Education, Taipei Municipal University of Education, No. 1 Aiguo W. Rd., Taipei City, 100, Taiwan. lsc2kpsu@yahoo.com.tw
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MeSH Terms
Descriptor/Qualifier:
Adult
Computer Graphics*
Distance Perception
Entropy
Feedback
Humans
Information Theory*
Male
Nonlinear Dynamics*
Orientation*
Psychomotor Performance*
Psychophysics
Reaction Time

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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