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Hesitations in continuous tracking induced by a concurrent discrete taskSubjects performed a continuous visually-guided pursuit tracking task with the right hand. From time to time (intervals averaging 30 sec) an auditory tone appeared signaling the subjects to perform a discrete response with the left hand. The presence of this tone was frequently associated with a hesitation in right-hand tracking which lasted 1/3 sec or longer. The rate of occurrence of these hesitations was about the same when the left-hand response involved a choice between competing responses as when the left hand responded in a predetermined direction. Hesitations occurred for three different mechanical tracking manipulanda using different controlling muscles, and appeared to be due to freezing rather than to relaxation of muscular action. The rate of occurrence of hesitations declined with practice, and this improvement in right-hand performance was accompanied by an improvement in performance of the concurrent left-hand response. The presence of hesitations, and their reduction with practice, can be interpreted within several viewpoints.
Document ID
19870063890
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Klapp, Stuart T.
(California State Univ. Hayward, CA, United States)
Kelly, Patricia A.
(California State Univ. Hayward, CA, United States)
Netick, Allan
(California State University Hayward, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1987
Publication Information
Publication: Human Factors
Volume: 29
ISSN: 0018-7208
Subject Category
Behavioral Sciences
Accession Number
87A51164
Funding Number(s)
CONTRACT_GRANT: NCC2-223
Distribution Limits
Public
Copyright
Other

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