A confirmatory factor analytic investigation of the TAS-20: Corroboration of a five-factor model and suggestions for improvement
A confirmatory factor analytic investigation of the TAS-20: Corroboration of a five-factor model and suggestions for improvement
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DOI：
10.1080/00223890701629730
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发表时间：
2007-12-01
影响因子：
3.4
通讯作者：
Stough, Con
中科院分区：
文献类型：
--
作者：
Gignac, Gilles E.;Palmer, Benjamin R.;Stough, Con
述情障碍代表了个体差异维度，其特征是难以识别情绪，难以描述情绪，以及一种功利主义的思维方式。多伦多述情障碍量表(TAS-20；Bagby，Parker，&Taylor，1994)是一种常用的述情障碍量表，尽管已有多项研究检验了TAS-20的因素结构，但仍有许多问题尚未解决。具体地说，TAS-20严重不平衡的条目性质被认为限制了对实质性外部导向思维(EOT)因素的解释。此外，也有人提出，EOT因子可以用2个斜因子来更好地表示。对TAS-20验证性工厂分析(CFA)文献的回顾表明，通过使用嵌套因素建模方法，CFA策略可能会有所改进。基于355名受试者的样本，我们证明TAS-20由5个实质性因素组成的嵌套因素模型更好地代表了TAS-20。一种评估内部一致性信度的新的潜在变量方法表明，TAS-20中的子量表与不可接受的低可靠性水平相关，而不受全球述情障碍因素的影响。尽管有一些终审法院的证据表明消极因素的合理性，但对有问题的项目的彻底检查提供了另一种解释。鼓励进一步编制TAS-20‘S外向型思维分量表。
Alexithymia represents an individual difference dimension characterized by difficulties identifying emotions, difficulties describing emotions, and a utilitarian approach to thinking. The Toronto Alexithymia Scale-20 (TAS-20; Bagby, Parker, & Taylor, 1994) is a frequently used inventory to measure alexithymia, and although several studies have examined the factor structure of the TAS-20, a number of issues remain unresolved. Specifically, the severely unbalanced item-keyed nature of the TAS-20 has been suggested to limit the interpretation of the substantive Externally Oriented Thinking (EOT) factor. Further, it has also been suggested that the EOT factor may be better represented by 2 oblique factors. A review of the TAS-20 confirmatory factory analysis (CFA) literature has suggested that some improvement in CFA strategies could possibly be afforded by using a nested factors modeling approach. Based on a sample of 355 participants, we demonstrated that the TAS-20 was better represented by a nested factors model with 5 substantive factors. A novel, latent variable approach to estimating internal consistency reliability revealed that the subscales within the TAS-20 were associated with unacceptably low levels of reliability independently of the global alexithymia factor. Although there was some CFA evidence to suggest the plausibility of a negatively keyed factor, a thorough examination of the items in question offered an alternative interpretation. Further development of the TAS-20's Externally Oriented Thinking subscale is encouraged.