Dimensionality, Nomological Validity and Internal Consistency of the Brief Davidson Scale for Post-traumatic Stress in Students from Santa Marta, Colombia
DOI:
https://doi.org/10.17533/udea.rfnsp.e339851Keywords:
post-traumatic stress, brief Davidson scale, post-conflict Colombia, validation studies, Santa Marta, ColombiaAbstract
Objective: To determine the dimensionality, nomological validity and internal consistency of the brief Davidson scale for post-traumatic stress in average vocational students from Santa Marta, Colombia. Methodology: In the second semester of 2018, a total of 1,462 tenth and eleventh grade students aged between 13 and 17 years old (M = 16.0; DE = 0.8), 60.3% female, filled out the brief Davidson scale for post-traumatic stress. Exploratory and confirmatory factor analyses were performed. The internal consistency of the dimension was calculated with Cronbach's alpha and McDonald's omega coefficients. Results: In the exploratory factor analysis, the brief Davidson scale for post-traumatic stress showed Kaiser-Meier-Olkin = 0.714, Barttlet's chi square = 783.3 (gl = 6; p = 0.001), and an eigenvalue of 1.99, which explained 49.7% of the variance. In the confirmatory factor analysis, chi square = 5.921; gl = 2; p = 0.052; root of the mean square of the error of approximation = 0.037 (CI 90% 0.000-0.072); comparative adjustment index = 0.955; Tucker-Lewis index = 0.985 standardized mean square residual = 0.011. Cronbach's alpha was 0.66, and McDonald's omega was 0.69. Conclusions: The brief Davidson scale for post-traumatic stress is one-dimensional, with acceptable internal consistency.
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