VHA, NCOD, Cincinatti, Ohio 45249, USA.
Disabil Rehabil. 2010;32(15):1300-10. doi: 10.3109/09638280903464489.
This study examined the psychometric properties of the positive and negative affect schedule (PANAS) in a post-polio sample and the relationship of these affect the dimensions.
Exploratory factor analysis (EFA) was performed with sample 1 (randomly selected from the total sample), to examine the underlying dimensions of the PANAS. Confirmatory factor analyses (CFA) were performed with samples 2 and 1 to assess the fit of the models to the data. Model fit tests were based on the chi(2) likelihood ratio test, comparative fit index (CFI), and root mean square estimate of approximation (RMSEA).
In the EFA phase, two factors were extracted and oblique rotation was applied to interpret pattern of loadings. In the CFA phase, both samples 1 and 2, model fit tests demonstrated that the models were unsatisfactory and indicated poor fit of the model to the observed data. Post-hoc model fitting of three error correlations as indicated by modification indices, proved a better fit for both samples.
The results of the factor analyses suggested the possibility of a third dimension reflecting negative affect and that affect may consist of more than two general dimensions in the context of disability. In post-polio population, some of the symptoms of negative affect may be caused by physical symptoms that are related to the disability experience.
本研究旨在检验后肌萎缩侧索硬化症（ALS）患者正性负性情绪量表（PANAS）的心理测量特性及其各维度间的关系。
采用探索性因子分析（EFA）对样本 1（从总样本中随机选择）进行分析，以检验 PANAS 的潜在维度。采用样本 2 和 1 进行验证性因子分析（CFA），以评估模型对数据的拟合程度。模型拟合检验基于卡方似然比检验、比较拟合指数（CFI）和均方根逼近误差估计值（RMSEA）。
在 EFA 阶段，提取出两个因子，并采用斜交旋转解释负荷模式。在 CFA 阶段，样本 1 和 2 的模型拟合检验均表明，模型的拟合不理想，表明模型对观察数据的拟合较差。根据修正指数指出的三个误差相关性的事后模型拟合，表明两种样本的模型拟合均得到改善。
因子分析的结果表明，可能存在第三个维度反映负性情绪，且在残疾背景下，情绪可能由两个以上的一般维度组成。在后肌萎缩侧索硬化症患者中，一些负性情绪的症状可能是由与残疾经历相关的身体症状引起的。
