Validity of a computer-based risk assessment method for visual ergonomics

作者：Marina Heiden, Camilla Zetterberg, Per Lindberg, Per Nylén, Hillevi Hemphälä · 发表于：International Journal of Industrial Ergonomics · 年份：2019 · DOI：10.1016/j.ergon.2019.05.006 · 被引用次数：23 · 研究领域：Ergonomics and Musculoskeletal Disorders、Musculoskeletal pain and rehabilitation、Safety Warnings and Signage

To describe the development of a computer-based risk assessment method for visual ergonomics, and assess its face validity, content validity, and internal consistency. The risk assessment method contained a questionnaire for the worker, an evaluation form for the evaluator, a section of follow-up questions based on the worker's responses, and a section for recommended changes, including an overall risk assessment with respect to daylight, lighting, illuminance, glare, flicker, work space, work object and work postures, respectively. Forty-eight trained evaluators used the method to perform 224 workplace evaluations. Content validity of the method was assessed by the completeness and distribution of responses, and internal consistency was assessed by Cronbach's alpha, Spearman's rank correlation between items and indices, and exploratory factor analysis. The proportion of missing values in items was generally low (questionnaire: 0–2.3%; evaluation form: 1.4–4.1%). In the questionnaire, items about double vision, migraine and corrective lenses had limited information content. Cronbach's alpha and item-index correlations for the indices frequency of eyestrain, intensity of eyestrain, visual symptoms, lighting conditions, frequency of musculoskeletal discomfort and intensity of musculoskeletal discomfort were satisfactory. Based on the factor analysis, suggestions for improving some of the indices were made. Our findings suggest that this computer-based method is a valid instrume...