| Summary: | 博士 === 國立臺中教育大學 === 教育資訊與測驗統計研究所 === 105 === Stress becomes a significantly serious issue among Vietnam university students and we need valid, reliable and user-friendly tools to understand it more. The purpose of this present study is to develop the Vietnam undergraduate stress scale for measuring the psychological stress of Vietnam university students. This study is innovative in the sense that, to the best of the researcher’s knowledge, such a scale has not been developed in Vietnam as yet.
In this vein, the questionnaire was administered to 1,750 (495 males and 1,255 females) Vietnam university students who participated in this research. In the sample, there were 708 (34%) freshmen, 537 (30.7%) sophomores, 458 (26.2%) juniors, and 137 (7.8%) seniors undergraduates from the sciences (n=705, 40.3%) and social sciences (n=1,045, 59.7%) faculties at nine departments at four universities in the survey. Each item has five Likert response options, typically being ‘never’, ‘rarely’, ‘sometimes’, ‘often’, ‘almost always’. The version of the Vietnam undergraduate stress scale consisted of 68 items was constructed. The items belonged to six subscales that covered the academic, environment, family, financial, behavior, and psychology domains. Exploratory factor analysis and structural equation modelling were used to validate the scales.
This study presented new results from first-order factor model and second-order factor model by applying the CTT scores and IRT measures into structural equation modelling to find the best model-fit. The expected relationship between the scales and the criterion measures was tested. The data were statistically tested and a final version of 36 items was compiled. Structure equation model revealed that a second-order model on the IRT scores of the items provided the best goodness-of-fit. The Vietnam undergraduate stress scale was found to have good internal consistency (Cronbach’s alpha of the subscales ranged from 0.645 to 0.828). The results also reported the Chi-square value (χ^2) = 2106.07, df =582, the Chi-square to df ratio of 3.62, RMSEA=.039, SRMR=.001, AGFI=.915, and GFI=.925, which together indicate satisfactory from second-order model. Furthermore, the Vietnam undergraduate stress scale is an efficient, reliable, and valid tool for assessing stress among university students.
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