The tolerance for visual feedback distortions in a virtual environment

Short Title:
The tolerance for visual feedback distortions in a virtual environment
Model System:
TBI
Reference Type:
Journal Article
Accession No.:
J49764.
Journal:
Physiology and Behavior
Year, Volume, Issue, Page(s):
2002, vol. 77, issue 1, pp 651-655
Publication Website:
Abstract:
Study investigated the extent to which distortions in visual feedback extend the just noticeable difference (JND) of a finger's force production and position displacement in a virtual robotic environment. A JND is defined as the percentage of increase in stimulus that is required to reliably distinguish 2 stimuli. Results showed that subjects were not capable of reliably detecting inaccuracies in visual representation until there was a 36 percent distortion. This discrepancy is significantly larger than the JNDs reported in the past, indicating that a virtual robotic environment could be a valuable tool for people recovering from stroke. In order to extend the strength and mobility, it is important to create an environment that can patients' steer actual movements toward producing more force and moving further than they thought they were capable of doing. Study was conducted to identify factors influencing successful return to productive activity and to understand how return to productive activity 1 year after traumatic brain injury (TBI) relates to measures of impairment, disability, handicap, and community integration. During telephone interviews with 105 participants, data for the Disability Rating Scale (DRS) and the Community Integration Questionnaire (CIQ), and premorbid and current employment status were obtained. Of the 105 particpants, 72 percent achieved RTPA, associated with the following factors: premorbid educational level, premorbid psychiatric history, violent mechanism of injury, discharge status after acute hospitalization, prior alcohol and drug use, and injury severity.
Author(s):
Matsuoka, Yoky; Allin, Sonya J.; Klatzky, Roberta L.; Wagner, A. K.; Hammond, F. M.; Sasser, H. C.; Wiercisiewski, D.
Author Address(es):

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