RELIABILITY AND VALIDITY ANALYSIS OF INDOOR AIR QUALITY, CREW STRESS LEVEL AND SELF EFFICACY IN WARSHIP ENVIRONMENT: A PILOT SURVEY
DOI:
https://doi.org/10.24191/myse.v12i2.7079Keywords:
Indoor Air Quality (IAQ), Stress Level, Self-EfficacyAbstract
Warship environments present unique challenges to personnel, including concerns about indoor air quality (IAQ). There are physical symptoms and health effects associated with poor IAQ, which affect crew stress levels. Both variables were proportionately influenced by crew self-efficacy. Previous research demonstrates a lack of holistic studies of the relationship between IAQ, self-efficacy, and crew stress levels on board warships. Hence, further studies regarding the instrument’s effectiveness in measuring all variables would be worthwhile. Thus, this study aims to evaluate the reliability and validity of the instrument to measure IAQ, crew stress level, and self-efficacy amongst warship crew by utilizing data collected from a pilot survey using the Statistical Package for the Social Sciences (SPSS). Reliability and validity of measurement variables using content validity and reliability method. The content validity assessment was carried out by three experts, including the researcher's supervisor and the Director of Malaysia Armed Forces Physiology and Counselling. Consequently, the researcher invited ten personnel with experience serving onboard KD JEBAT to participate in the face validity process. Data were collected from a sample of 52 warship personnel, and reliability analyses were conducted using Cronbach's alpha coefficient to assess the internal consistency of each dimension. Corrected item-total correlations were also examined to evaluate the relationship between individual survey items and their respective constructs. The reliability analysis revealed an internal consistency (acceptable to good levels) within variables which is IAQ, crew stress level, and self-efficacy. However, the stress-triggered dimension exhibited a lower reliability coefficient. Additionally, the corrected item-total correlations provide a significant relationship between items and corresponding constructs in support of the validity of the measurement scales. As a result, all items were accepted and valid to conduct actual survey with the value of Cronbach's alpha for dimension (a) Indoor Air Contaminant Parameter (0.747), (b) Indoor Air Physical Parameter (0.708), (c) Stress Response (0.715), (d) Stress Triggered (0.703), (e) Victorious Experience (0.780), (f) Performance Outcome (0.705). The researcher utilizes the analysis results to design the best questionnaire survey for the actual survey. Future research may enhance the understanding of this domain and contribute to the betterment of warship personnel.
References
Ariffin, A., Kamaruddin, A.F. & Zahaba, M. (2021). Preliminary study on indoor climate in a naval Warship.
Bhatnagar, R., Kim, J., & Many, J. E. (2018). Candidate Surveys on Program Evaluation : Examining Instrument Reliability , Validity and Program Effectiveness. American Journal of Educational Research, 2(8), 683–690. https://doi.org/10.12691/.
Connelly, L. M. (2018). Pilot studies. Medsurg Nursing, 17(6), 411-2. Cohen, S., Kamarck, T., and Mermelstein, R. (1995). A global measure of perceived stress. Journal of Health and Social Behavior, 24, 386-396.
Cortina, J. M. (1993). What is coefficient alpha? An examination of theory and applications. Journal of applied psychology, 78(1), 98. Cruise Arabia. (2020, February 14). Top 10 cruise ship refit and refurbishments in 2020. https://cruisearabia.com/2020/02/14/top-10-cruise-ship-refit-and-refurbishments-in-2020/.
Cohen, S., Kessler, R. C., & Gordon, L. U. (Eds.). (1995). Measuring stress: A guide for health and social scientists. New York, NY: Oxford University Press.
Cronbach, L. J., Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297-334, 1951.
Frontczak, M., & Wargocki, P. (2018). Literature survey on how different factors influence human comfort in indoor environments. Building and Environment, https://doi.org/10.1016/j.buildenv.2010.10.021.
Gawade, A., Sanap, A., Baviskar, V. S., Jahnige, R., Zhang, Q., & Zhu, T. (2020). Indoor air quality improvement. arXiv. https://arxiv.org/abs/2012.15387.
Isaac, S., & Michael, W. B. (2016). Handbook in research and evaluation. San Diego, CA: Educational and Industrial Testing Services. Department of Occupational Safety and Health. (2010). Industry code of practice on indoor air quality (JKKP DP(S) 127/379/4-39). Ministry of Human Resources Malaysia.
Bell, J. (2020). Doing your research project: A guide for first-time researchers in education, health and social science (7th ed.). McGraw-Hill Education.
Liu, Y., Frangopol, D. M., & Cheng, M. (2019). Risk-informed structural repair decision making for service life extension of aging naval ships. Marine Structures, 64, 276–292. https://doi.org/10.1016/j.marstruc.2018.10.008.
Neuman, W. L. (2015). Social research methods: Quantitative approaches (6th ed.). http://book-nerd.info/wpcontent/uploads/pdfs/Social%20Research%20Methods%20Quantitative%20Approaches%206th%20Edition%20by%20W%20Lawrence%20Neuman.pdf
Polit, D. F., Beck, C. T., & Hungler, B. P. (2021). Essentials of nursing research: Methods, appraisal, and utilization (5th ed.). Lippincott Williams & Wilkins.
Schwarzer, R., & Jerusalem, M. (2015). General Self-Efficacy Scale (GSE) [Database record]. APA PsycTests. Sekaran, U., & Bougie, R. (2016). Research Methods for Business: A Skill-Building Approach (7th ed.). West Sussex: John Wiley & Sons.
Zikmund, W. G. (2018). Business research methods (9th ed.). Thomson South-Western.
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