The Inventory of Depression and Anxiety Symptoms-Expanded version (IDAS-II) is one of the few tools designed to assess internalizing symptoms based on dimensional models. We conducted two studies, the first testing internal validity aspects of the IDAS-II and the second testing the external validity of the scales. In the first study we adapted the IDAS-II to Brazilian Portuguese and tested its internal structure, including a higher order factorial solution coherent with the internalizing spectrum, the stability of the factor structure, and its measurement invariance for sex and racial groups. Participants were 2,379 Brazilian adults. In the second study, we investigated the IDAS-II scales' associations with broad pathological personality traits in Brazilian (N = 245) and North American (N = 402) samples. The results of the first study indicated that the IDAS-II scales are grouped into three first-order factors (Distress, Obsessions/Fear, and Positive Mood), replicating Wester et al. (2022) and Petre et al. (2023). Our results also suggested the plausibility of an internalizing second-order factor for the IDAS-II Brazilian version. The multigroup confirmatory factor analysis shows that this scale is invariant for males and females and for White and Black/Brown people. In the second study, the IDAS-II scales demonstrated mostly coherent associations with broad domains of pathological personality traits. Besides the internal validity of the Brazilian IDAS-II, our results also provide information about its external validity and expand its nomological network, as it is the first study reporting its associations with broad domains of pathological personality traits. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

中文翻译：

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巴西版抑郁和焦虑症状清单扩展版：内部结构、性别和种族的不变性以及与病态人格特征的关联。


抑郁和焦虑症状清单扩展版 (IDAS-II) 是为数不多的基于维度模型评估内化症状的工具之一。我们进行了两项研究，第一项测试 IDAS-II 的内部有效性，第二项测试量表的外部有效性。在第一项研究中，我们将 IDAS-II 改编为巴西葡萄牙语，并测试了其内部结构，包括与内化谱一致的高阶因子解、因子结构的稳定性及其对性别和种族群体的测量不变性。参与者为 2,379 名巴西成年人。在第二项研究中，我们在巴西 (N = 245) 和北美 (N = 402) 样本中调查了 IDAS-II 量表与广泛病理性人格特征的关联。第一项研究的结果表明，IDAS-II 量表分为三个一级因素（痛苦、强迫/恐惧和积极情绪），复制了 Wester 等人的研究。 （2022）和 Petre 等人。 （2023）。我们的结果还表明 IDAS-II 巴西版本的内化二阶因子是合理的。多组验证性因素分析表明，该量表对于男性和女性以及白人和黑人/棕色人种来说是不变的。在第二项研究中，IDAS-II 量表显示出与病理性人格特质的广泛领域之间的大部分连贯关联。除了巴西 IDAS-II 的内部有效性之外，我们的结果还提供了有关其外部有效性的信息并扩展了其法理网络，因为这是第一项报告其与广泛的病理性人格特质领域关联的研究。 （PsycInfo 数据库记录 (c) 2024 APA，保留所有权利）。