Abstract
The objective of the study was to validate adapted versions of the Glasgow Anxiety Scale for people with Intellectual Disabilities (GAS-ID) simultaneously developed in English and French. A sample of 361 youth with mild to moderate intellectual disability (ID) (M = 15.78 years) from Australia (English-speaking) and Canada (French-speaking) participated in this study. The results supported the factor validity and reliability, measurement invariance (between English and French versions), a lack of differential items functioning (as a function of youth’s age and ID level, but not sex in the English-Australian sample), temporal stability (over one year interval), and convergent validity (with global self-esteem and school loneliness) of a bi-factor exploratory structural equation modeling representation of the GAS-ID. The present study supports the psychometric properties of the English-Australian and French-Canadian versions of the adapted GAS-ID.
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This study was supported by grants from the Australian Research Council (ARC; DP140101559) and from the Social Sciences and Humanities Research Council of Canada (SSHRC; 430-2012-0091, 435-2014-0909).
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CM is contributed to Funding (both countries), Study Design (both countries), Data Collection (Canada), Conceptualization, Methodology, Analyses, Writing (original draft, review, editing); AJSM is contributed to Funding (both countries), Study Design (both countries), Data Collection (Australia), Conceptualization, Methodology, Analyses, Writing (original draft, review, editing); CG is contributed to Conceptualization, Methodology, Analyses, Writing (original draft, editing); EO is contributed to Conceptualization, Methodology, Writing (original draft, review, editing); DT is contributed to Funding (Australia), Study Design (Australia), Data Collection (Australia), Writing (original draft, review, editing); RGC is contributed to Funding (Australia), Study Design (Australia), Data Collection (Australia), Writing (original draft, review, editing); SB is contributed to Conceptualization, Methodology, Writing (original draft, review, editing).
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Maïano, C., Morin, A.J.S., Gagnon, C. et al. Validation of an Adapted Version of the Glasgow Anxiety Scale for People with Intellectual Disabilities (GAS-ID). J Autism Dev Disord 53, 1560–1572 (2023). https://doi.org/10.1007/s10803-021-05398-7
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DOI: https://doi.org/10.1007/s10803-021-05398-7