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Evaluation of the ergonomics checklist for office chair

Zakaria, Nurul Husna (2015) Evaluation of the ergonomics checklist for office chair. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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Sitting at work for a long time in the office can cause musculoskeletal disorders (MSDs). Sustaining any static posture, such as sitting can affect the human body in terms of increasing pressure on the muscles, ligaments and other soft tissues of the musculoskeletal system. This research clarifies the development of a new assessment tool for ergonomic office chair evaluation checklist to investigate the risk factor of office workers at the office. The purpose of this study is to propose and develop an ergonomic assessment tool capable of quantifying subjective occupant sitting discomfort during office work and to evaluate the proposed ergonomic assessment tool in terms of validity test and reliability test. The initial development of the new tool involved the following procedures. Firstly, the new assessment tool was developed based on literature review. This is followed by the identification of office chair parameters, questionnaire design, grand score and action level development and the development of the observational tool office ergonomic chair assessment (OFFECA) prototype. Secondly, the psychometric properties were evaluated by administering the questionnaire to 50 office workers in ten offices around UTHM. The reliability of the observation was assessed through internal consistency. Construct validity was analyzed by content validity, which is by obtaining the opinion of expert judges in the ergonomic field. Concurrent validity was also used in this prototype to find out the relationship between existing tools and the new assessment tool. Reliability was determined based on the internal consistency of the prototype verified using Cronbach’s alpha that is 0.832 and the range Cronbach’s alpha values was 0.814 to 0.839. The construct validity analysis using Pearson’s Correlation shows correlations are significant at (p< 0.01) and (p< 0.05) between the existing tools and the prototype of the office ergonomic chair assessment. To conclude, results indicated that the new assessment tool had good psychometric properties for use in studies involving office workers.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA174 Engineering design
Depositing User: Mrs Hasliza Hamdan
Date Deposited: 25 Apr 2016 04:34
Last Modified: 25 Apr 2016 04:34
URI: http://eprints.uthm.edu.my/id/eprint/7827
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