Psychophysical frequency and sustained exertion at varying wrist postures for a drilling task
Article Abstract:
A study of psychophysical frequency and sustained exertion at varying wrist postures for a drilling task carried out on 12 healthy females reveals that the task of drilling can be optimized by either maintaining a neutral posture of the wrist or when a deviation in the posture of the wrist is required, by decreasing the task frequency and maintaining the deviation of the wrist below two thirds of ulnar deviation maximum and one-third of flexion maximum. A three-minute session increases the blood pressure and pulse rate of the subject doing the task.
Publication Name: Ergonomics
Subject: Business
ISSN: 0014-0139
Year: 1995
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Effects of stimulus duration and task experience on gaze shift
Article Abstract:
The stimulus availability and task experience affect head movement amplitude (HMA) in gaze shift. HMA increases and eye movement amplitude decreases as a result of increase in stimulus duration. A 24% gaze shift is achieved via head movement when the duration is 500 milliseconds and 37% when the duration is 1000 milliseconds. Task experience of previous sessions effects HMA. A positive relationship exists between head movement amplitude and head movement duration. The effect of task experience calls for rigorous personnel training.
Publication Name: Ergonomics
Subject: Business
ISSN: 0014-0139
Year: 1996
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Quantitative assessment of effects of visual scanning on concurrent task performance
Article Abstract:
A quantitative test of the influence of visual scanning on concurrent task performance indicates the effects of visual scanning to be higher in dual task conditions than in single ones. The test involves information acquisition and integration, searching for spatial or verbal targets, and deciding on a course of action. A concurrent spatial task produces higher increases in scanning demand than a visual task when there is greater location uncertainty of visual scanning.
Publication Name: Ergonomics
Subject: Business
ISSN: 0014-0139
Year: 1996
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