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Psychometric validation and refinement of the Interoception Sensory Questionnaire (ISQ) in adolescents and adults on the autism spectrum
Molecular Autism ( IF 6.2 ) Pub Date : 2021-06-07 , DOI: 10.1186/s13229-021-00440-y
Evan Suzman 1 , Zachary J Williams 2, 3, 4, 5 , Jacob I Feldman 2, 4 , Michelle Failla 6 , Carissa J Cascio 3, 4, 7, 8 , Mark T Wallace 2, 3, 4, 7, 8, 9 , Maria Niarchou 10 , James S Sutcliffe 8, 11 , Ericka Wodka 12, 13 , Tiffany G Woynaroski 2, 3, 4, 7
Affiliation  

Individuals on the autism spectrum are reported to display alterations in interoception, the sense of the internal state of the body. The Interoception Sensory Questionnaire (ISQ) is a 20-item self-report measure of interoception specifically intended to measure this construct in autistic people. The psychometrics of the ISQ, however, have not previously been evaluated in a large sample of autistic individuals. Using confirmatory factor analysis, we evaluated the latent structure of the ISQ in a large online sample of adults on the autism spectrum and found that the unidimensional model fit the data poorly. Using misspecification analysis to identify areas of local misfit and item response theory to investigate the appropriateness of the seven-point response scale, we removed redundant items and collapsed the response options to put forth a novel eight-item, five-response choice ISQ. The revised, five-response choice ISQ (ISQ-8) showed much improved fit while maintaining high internal reliability. Differential item functioning (DIF) analyses indicated that the items of the ISQ-8 were answered in comparable ways by autistic adolescents and adults and across multiple other sociodemographic groups. Our results were limited by the fact that we did not collect data for typically developing controls, preventing the analysis of DIF by diagnostic status. Additionally, while this study proposes a new 5-response scale for the ISQ-8, our data were not collected using this method; thus, the psychometric properties for the revised version of this instrument require further investigation. The ISQ-8 shows promise as a reliable and valid measure of interoception in adolescents and adults on the autism spectrum, but additional work is needed to examine its psychometrics in this population. A free online score calculator has been created to facilitate the use of ISQ-8 latent trait scores for further studies of autistic adolescents and adults (available at https://asdmeasures.shinyapps.io/ISQ_score/ ).

中文翻译:

自闭症青少年和成人内感感觉问卷 (ISQ) 的心理测量验证和完善

据报道,患有自闭症谱系的人会表现出内感受的改变,即对身体内部状态的感觉。Interoception Sensory Questionnaire (ISQ) 是一个包含 20 个项目的自我报告测量内部感受,专门用于测量自闭症患者的这种结构。然而,ISQ 的心理测量学以前并未在大量自闭症个体样本中进行过评估。使用验证性因素分析,我们在自闭症谱系成年人的大量在线样本中评估了 ISQ 的潜在结构,发现一维模型与数据的拟合很差。使用错误指定分析来识别局部不匹配区域和项目响应理论来调查七点响应量表的适当性,我们删除了多余的项目并折叠了响应选项,以提出一个新颖的八项目、五响应选择 ISQ。修订后的五响应选择 ISQ (ISQ-8) 在保持高内部可靠性的同时显示出显着改善的拟合度。差异项目功能 (DIF) 分析表明,自闭症青少年和成人以及多个其他社会人口群体以类似的方式回答了 ISQ-8 的项目。我们的结果受到以下事实的限制,即我们没有为通常开发的控件收集数据,从而阻止了通过诊断状态对 DIF 的分析。此外,虽然这项研究为 ISQ-8 提出了一个新的 5 级反应量表,但我们的数据并不是使用这种方法收集的;因此,该仪器修订版的心理测量特性需要进一步调查。ISQ-8 有望成为自闭症青少年和成人内感的可靠有效衡量指标,但还需要开展更多工作来检验其在该人群中的心理测量学。已经创建了一个免费的在线分数计算器,以促进使用 ISQ-8 潜在特征分数进一步研究自闭症青少年和成人(可在 https://asdmeasures.shinyapps.io/ISQ_score/ 获得)。
更新日期:2021-06-07
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