Evaluation of the Internal Consistency, Factor Structure, and Validity of the Depression Change Expectancy Scale
Evaluation of the Internal Consistency, Factor Structure, and Validity of the Depression Change Expectancy Scale
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DOI：
10.1177/1073191113517929
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发表时间：
2014-10-01
期刊：
影响因子：
3.8
通讯作者：
Backs-Dermott, Barb J.
中科院分区：
文献类型：
--
作者：
Eddington, Kari M.;Dozois, David J. A.;Backs-Dermott, Barb J.
两项研究对抑郁变化预期量表（DCES）的心理测量特性和预测有效性进行了检验，该量表是最初为焦虑症患者开发的预期量表的修改版。在研究 1 中，对 416 名焦虑症本科生进行了包含 20 项的量表和一系列问卷调查，结果显示出良好的内部一致性。双因素解决方案最简洁地解释了方差，其中一个因素包含所有悲观措辞的项目 (DCES-P)，第二个因素包含所有乐观措辞的项目 (DCES-O)。 DCES-P 显示了与相关结构的其他测量值的相关模式，与假设的关系一致； DCES-O 与其他指标表现出类似但较弱的关系。使用多级模型来检验 DCES 在 63 名成人临床样本中的预测效用（研究 2）。抑郁症状的改善（超过 6 周）与乐观预期密切相关，但与对变化的悲观预期无关。 DCES 似乎是衡量抑郁症状个体改善预期的一个有前景的指标。
The psychometric properties and predictive validity of the Depression Change Expectancy Scale (DCES), a modification of an expectancy scale originally developed for patients with anxiety disorders, were examined in two studies. In Study 1, the 20-item scale was administered along with a battery of questionnaires to a sample of 416 dysphoric undergraduate students and demonstrated good internal consistency. A two-factor solution most parsimoniously accounted for the variance, with one factor containing all pessimistically worded items (DCES-P) and the second containing all optimistically worded items (DCES-O). The DCES-P showed patterns of correlations with other measures of related constructs consistent with hypothesized relationships; the DCES-O showed similar, but weaker, relationships with the other measures. Multilevel modeling was used to examine the predictive utility of the DCES in a clinical sample of 63 adults (Study 2). Improved depressive symptoms (over 6 weeks) were strongly associated with optimistic expectancies but were unrelated to pessimistic expectancies for change. The DCES appears to be a promising measure of expectancies for improvement among individuals with depressive symptoms.