Validation of an Adapted Version of the Glasgow Anxiety Scale for People with Intellectual Disabilities (GAS-ID)

Christophe Maïano; Alexandre J S Morin; Cynthia Gagnon; Elizabeth Olivier; Danielle Tracey; Rhonda G Craven; Stéphane Bouchard

doi:10.1007/s10803-021-05398-7

Validation of an Adapted Version of the Glasgow Anxiety Scale for People with Intellectual Disabilities (GAS-ID)

J Autism Dev Disord. 2023 Apr;53(4):1560-1572. doi: 10.1007/s10803-021-05398-7. Epub 2022 Feb 9.

Authors

Christophe Maïano^{1

2}, Alexandre J S Morin³, Cynthia Gagnon⁴, Elizabeth Olivier⁵, Danielle Tracey⁶, Rhonda G Craven⁷, Stéphane Bouchard⁸

Affiliations

¹ Cyberpsychology Laboratory and Department of Psychoeducation and Psychology, Université du Québec en Outaouais, Campus de Saint-Jérôme, 5 rue Saint-Joseph, Saint-Jérôme, QC, J7Z 0B7, Canada. christophe.maiano@uqo.ca.
² Substantive-Methodological Synergy Research Laboratory, Department of Psychology, Concordia University, Montreal, Canada. christophe.maiano@uqo.ca.
³ Substantive-Methodological Synergy Research Laboratory, Department of Psychology, Concordia University, Montreal, Canada.
⁴ Department of Psychoeducation and Psychology, Université du Québec en Outaouais, Campus de Saint-Jérôme, Saint-Jérôme, Canada.
⁵ Département de Psychopédagogie et d'andragogie, Université de Montréal, Montreal, Canada.
⁶ School of Education, Translational Health Research Institute, Western Sydney University, Sydney, Australia.
⁷ Institute for Positive Psychology and Education, Australian Catholic University, Sydney, Australia.
⁸ Cyberpsychology Laboratory and Department of Psychoeducation and Psychology, Université du Québec en Outaouais (UQO), Gatineau, Canada.

PMID: 35138559
DOI: 10.1007/s10803-021-05398-7

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.

Keywords: Age; Intellectual disability; Measurement invariance; Multiple indicators multiple causes; Psychological wellbeing; Special education needs.

MeSH terms

Adolescent
Anxiety / diagnosis
Australia
Autism Spectrum Disorder*
Canada
Humans
Intellectual Disability* / diagnosis
Psychometrics
Reproducibility of Results

Abstract

MeSH terms

Grants and funding