Psychometric properties of the Toronto Alexithymia Scale (TAS-20) for substance users
Psychometric properties of the Toronto Alexithymia Scale (TAS-20) for substance users
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DOI：
10.1016/j.jpsychores.2004.11.002
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发表时间：
2005-03-01
影响因子：
4.7
通讯作者：
Kosanke, N
中科院分区：
文献类型：
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作者：
Cleland, C;Magura, S;Kosanke, N
目的：确定多伦多述情障碍量表（TAS-20）的心理测量学特性，TAS-20是一种已建立的述情障碍自我报告测量方法，用于参与门诊认知行为治疗临床试验的物质使用者样本（N=230）。研究方法：使用验证性和探索性因素分析来确定物质使用者样本中TAS-20潜在因素的数量和性质。使用结构方程模型确定TAS-20的预测有效性。结果如下：与其他人群的TAS-20心理测量结果相比，发现了一个可比较但不完全相同的因素结构;情感因素的α系数为0.88，外部思维因素为0.62，总分为0.87。虽然，平均而言，物质使用者与本科生相比似乎没有提高述情障碍评分，但述情障碍预测较少的治疗参与，即，参加的会议较少，帮助联盟较弱。述情障碍还可以预测酒精使用结果，但不能预测药物使用结果。述情障碍和饮酒结果之间的关系取决于患者在基线时是否仅使用酒精。结论：TAS-20在该样本中具有相当好的心理测量特性，可以通过删除几个边缘问卷项目来改善。述情障碍似乎减弱物质滥用治疗的参与。需要在物质使用者样本中使用该结构和特定仪器的更多临床和研究经验。(c)2005年爱思唯尔公司All rights reserved.
Objective: To determine the psychometric properties of the Toronto Alexithymia Scale (TAS-20), an established self-report measure of alexithymia, for a substance user sample participating in a clinical trial of outpatient cognitive-behavioral therapies (N=230). Methods: Confirmatory and exploratory factor analyses were used to determine the number and nature of the factors underlying the TAS-20 in a sample of substance users. Structural equation modeling was used to determine the predictive validity of the TAS-20. Results: A factor structure comparable, but not identical, with TAS-20 psychometric results with other populations was found; alpha coefficients were .88 for the feelings factor, .62 for the external thinking factor, and .87 for the total score. Although, on average, the substance users did not appear to have elevated alexithymia scores compared with the undergraduate students, alexithymia predicted less treatment engagement, i.e., fewer sessions attended and weaker helping alliance. Alexithymia also predicted alcohol use outcomes but not drug use outcomes. The relation between alexithymia and drinking outcome was conditional on whether the patient was using solely alcohol at baseline. Conclusion: The TAS-20 has reasonably good psychometric properties in this sample, which might be improved by dropping several marginal questionnaire items. Alexithymia appears to attenuate substance abuse treatment engagement. More clinical and research experience with this construct and specific instrument in substance user samples is needed. (c) 2005 Elsevier Inc. All rights reserved.