University of Texas at San Antonio, San Antonio, Texas, USA.
University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA.
Arch Suicide Res. 2020 Jul-Sep;24(3):450-466. doi: 10.1080/13811118.2019.1645067. Epub 2019 Aug 16.
We provide a brief description of the development of the Trauma and Suicide Potential Index-5 (TSPI-5) and report on the psychometric properties of scores from the new instrument. The TSPI-5 is designed to assess an individual's desire to attempt suicide due to experiencing a trauma. We examined the structure of the instrument in two independent undergraduate samples. Study 1 (N = 415) examined the structure of the TSPI-5 using exploratory structural equation modeling. Study 2 (N = 538) reexamined the instrument structure using the same modeling strategy and also examined other validity estimates. Study 1 demonstrated an adequate fit to the sample data ( [1, N = 415] = 215.99, < .001, comparative fit index (CFI ) = .969, Tucker-Lewis non-normed fit index (TLI) = .939, root mean squared error of approximation (RMSEA) = .319 [90% confidence interval (CI) = .283, .356], < .001) and suggested evidence for unidimensionality. Study 2 confirmed the unidimensionality of the TSPI-5 as shown by acceptable fit estimates to the sample data, (5, N = 538) = 80.45, < .001, CFI = .996, TLI = .99, RMSEA = .17 (90% CI = .140, .200), < .001. Scale reliability estimates for the TSPI-5 were good in Study 1 (omega = .94) and Study 2 (omega = .96). The TSPI-5 is a brief unidimensional instrument and its scores demonstrated good reliability and validity for assessing suicide-related behaviors due to experiencing a trauma in undergraduate samples.
我们简要描述了创伤和自杀倾向指数-5（TSPI-5）的发展，并报告了新工具评分的心理测量学特性。TSPI-5 旨在评估因经历创伤而产生自杀念头的个体。我们在两个独立的本科生样本中检验了该工具的结构。研究 1（N=415）使用探索性结构方程模型检验了 TSPI-5 的结构。研究 2（N=538）采用相同的建模策略重新检验了仪器结构，并检验了其他有效性估计。研究 1 表明，样本数据对模型有较好的拟合（[1，N=415]=215.99，<0.001，比较拟合指数（CFI）=0.969，Tucker-Lewis 非标准化拟合指数（TLI）=0.939，均方根误差逼近值（RMSEA）=0.319 [90%置信区间（CI）=0.283，0.356]，<0.001），并提出了单维性的证据。研究 2 证实了 TSPI-5 的单维性，样本数据的拟合估计值也可以接受，（5，N=538）=80.45，<0.001，CFI=0.996，TLI=0.99，RMSEA=0.17（90% CI=0.140，0.200），<0.001。TSPI-5 的量表信度估计在研究 1（omega=0.94）和研究 2（omega=0.96）中均较好。TSPI-5 是一种简短的单维工具，其在评估因经历创伤而产生的自杀相关行为方面，在本科生样本中具有良好的信度和效度。
