Development of the Big Five Personality Test for the Fourth-Year Undergraduate Students of Srinakharinwirot University
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Abstract
The objectives of this research were: 1) to develop a Big Five personality test for the fourth-year undergraduate students of Srinakharinwirot University; and 2) to investigate the quality of the Big Five personality test regarding validity, reliability and discrimination. The sample consisted of 425 fourth-year undergraduate students of Srinakharinwirot University in the first semester of the academic year 2019, obtained by multistage random sampling. The tool was a 5-point rating scale containing 60 items. Quality check for content validity was carried out, then the test was tried out and the discrimination for each item was determined by corrected Item-total correlation. The reliability was checked, using Cronbach's alpha coefficient. Confirmatory factor analysis was conducted by using LISREL Version 8.7. The research results revealed that:
1. The Big Five personality test for the fourth-year undergraduate students of Srinakharinwirot University consisted of neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness. Each factor was measured by 12 items. The test had a total of 60 items.
2. The content validity was 0.67-1.00, as the 5 factors, which are neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness, had the IOC value of 1.00, 1.00, .67-1.00, .67-1.00 and 1.00 respectively, and the reliability was .82, .80, .63, .85 and .69 respectively. The total reliability of the test was .91. The item discrimination index was 0.203 - 0.605.
3. The construct reliability was in credibility levels; the average variance extracted was in the range of 0.466 - 0.483, and the construct reliability was 0.391 - 0.447.
4. The results of using the second-order confirmatory factor analysis on the Big Five model showed that the model had goodness-of-fit in congruence with the empirical data, as the value of Chi-square () was 228.18, df = 1693, p=1.00, RMSEA = 0.000, NFI=0.79, SRMR =0.018, and GFI=0.98.
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