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Validity of an instrument that assesses functional abilities in people with profound intellectual and multiple disabilities: Look what I can do!
Journal of Intellectual & Developmental Disability ( IF 1.951 ) Pub Date : 2020-08-10 , DOI: 10.3109/13668250.2020.1785851
Marleen D. Wessels 1 , Muirne C. S. Paap 1, 2 , Annette A. J. Van der Putten 1
Affiliation  

ABSTRACT

Background: Research about the psychometric properties of the Behavioural Appraisal Scales (BAS) in people with profound intellectual and multiple disabilities (PIMD) is limited. This study evaluates invariance in factor structure, item bias and convergent validity of the BAS.

Methods: Data on the BAS from two studies (n = 25; n = 52) were analysed using the oblique multiple group method. The scale structure and item ordering were compared in the two groups. Convergent validity was assessed by correlating scores on the BAS with scores on two other instruments.

Results: Of all items, 16–18% correlated stronger with other subscales of the BAS than the subscale they were originally assigned to. Scale structure and order of difficulty differed between groups. Correlations between the BAS and two other instruments varied from low to excellent (r = .48–.85).

Conclusions: The results support the construct validity of the BAS. Removing, reassigning and adapting items may enhance construct validity.



中文翻译:

评估具有严重智力和多重残疾的人的功能能力的工具的有效性:看看我能做什么!

摘要

背景:关于严重智力和多重残疾 (PIMD) 的行为评估量表 (BAS) 的心理测量特性的研究是有限的。本研究评估了 BAS 在因子结构、项目偏差和收敛效度方面的不变性。

方法:使用斜多组方法分析来自两项研究(n  = 25;n  = 52)的 BAS 数据。比较两组的量表结构和项目排序。通过将 BAS 的分数与其他两种工具的分数相关联来评估收敛效度。

结果:在所有项目中,有 16-18% 的项目与 BAS 的其他分量表的相关性强于最初分配给它们的分量表。各组的量表结构和难度顺序不同。BAS 与其他两种工具之间的相关性从低到 极不等(r = .48–.85)。

结论:结果支持 BAS 的结构效度。删除、重新分配和调整项目可以提高结构效度。

更新日期:2020-08-10
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