Faculty of Human and Social Sciences, University of Enna Kore, Italy.
Neuropsychiatr Dis Treat. 2013;9:1427-32. doi: 10.2147/NDT.S51793. Epub 2013 Sep 19.
This study aims to verify the main psychometric properties of the Italian version of the Impact of Event Scale - Revised (IES-R) in a sample of flood victims.
The sample was composed of 262 subjects involved in the natural disaster of 2009 in the city of Messina (Italy). All participants completed the IES-R and the Dissociative Experiences Scale-II (DES-II) in order to verify some aspects of convergent validity.
THE EXPLORATORY AND CONFIRMATORY FACTOR ANALYSIS, USED TO VERIFY THE CONSTRUCT VALIDITY OF THE MEASURE, SHOWED A CLEAR FACTOR STRUCTURE WITH THREE INDEPENDENT DIMENSIONS: intrusion, avoidance, and hyper-arousal. The goodness-of-fit indices (non-normed fit index [NNFI] = 0.99; comparative fit index [CFI] = 0.99; standardized root mean square residual [SRMR] = 0.04; and root mean square error of approximation [RMSEA] = 0.02) indicated a good adaptation of the model to the data. The IES-R scales showed satisfactory values of internal consistency (intrusion, α = 0.78; avoidance, α = 0.72; hyper-arousal, α = 0.83) and acceptable values of correlation with the DES-II.
These results suggest that this self-reported and easily administered instrument for assessing the dimensions of trauma has good psychometric properties and can be adopted usefully, both for research and for practice in Italy.
本研究旨在验证修订后的事件影响量表（IES-R）意大利版本在洪水灾民样本中的主要心理测量特性。
该样本由 262 名参与 2009 年意大利墨西拿市自然灾害的受试者组成。所有参与者都完成了 IES-R 和分离体验量表-II（DES-II），以验证一些方面的收敛效度。
用于验证该测量的结构效度的探索性和验证性因素分析显示，具有三个独立维度的清晰因子结构：闯入、回避和过度警觉。拟合优度指数（非标准化拟合指数[NNFI] = 0.99；比较拟合指数[CFI] = 0.99；标准化根均方残差[SRMR] = 0.04；近似均方根误差[RMSEA] = 0.02）表明模型与数据的良好适配。IES-R 量表显示出良好的内部一致性（闯入，α=0.78；回避，α=0.72；过度警觉，α=0.83）和与 DES-II 的可接受的相关性值。
这些结果表明，这种自我报告的、易于管理的创伤维度评估工具具有良好的心理测量特性，在意大利，无论是研究还是实践，都可以有用地采用。
