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.
| Original language | English |
|---|---|
| Pages (from-to) | 1560-1572 |
| Number of pages | 13 |
| Journal | Journal of Autism and Developmental Disorders |
| Volume | 53 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2023 |
Bibliographical note
Publisher Copyright:© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Keywords
- Intellectual disability
- Multiple indicators multiple causes
- Psychological wellbeing
- Special education needs
- Measurement invariance
- Age
