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Effect of workload on task performance on inclined surfaces.

Bhattacharya-A; Succop-P; Bagchee-A
NIOSH 2001 Dec; :1-259
This study provides an experimental design for investigating the main effects and interaction between fall risk factors associated with task performance on inclined surface on workers' postural balance, postural muscle contraction patterns and eye movement patterns. The risk factors studied were standing surface inclination, job-task type, and experience in working on inclined/elevated surfaces, physical fatigue, and lack of visual cue in the environment. In this study, postural instability and propensity of loss of balance due to fall risk factors were evaluated for 82 industrial workers' performance (20 to 58 years of age) on test conditions, which represent combinations of these risk factors. This study addressed the following questions: (a) How do work surface inclination and muscle fatigue affect postural balance and postural muscle contraction patterns and eye movement patterns? (b) Do workers with experience in working on inclined surface have better visual spatial perception than those with no experience and (c) Does an experienced worker utilize his/her visual environment differently than the inexperienced worker in maintaining better postural balance during task performance on inclined surface? Results obtained from this study with industrial worker subjects now provide the basis for future prospective studies using a larger sample to determine the impact of training programs for improving postural balance of inexperienced workers working on incline surfaces. The results obtained from this study will now help enhance our existing statistical model showing the relationship between postural stability and propensity of loss of balance and the independent variables characterizing the experience, muscle fatigue, job-task type, visual cue and personal risk factors. The significant findings from this study are given in the previous section.
Risk-factors; Injuries; Task-performance; Posture; Eye-movement; Fatigue; Environmental-factors; Muscle-contraction; Muscles; Visual-perception; Statistical-analysis
Biomechanics-Ergonomics Research Labs and Epidemiology/Biostatistics Division, Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, OH 45267-0056
Publication Date
Document Type
Final Grant Report
Funding Amount
Funding Type
Fiscal Year
Identifying No.
NIOSH Division
Priority Area
Research Tools and Approaches; Risk Assessment Methods
Source Name
National Institute for Occupational Safety and Health
Performing Organization
University of Cincinnati, College of Medicine, Cincinnati, Ohio
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division