Factorial Validity, Reliability, Measurement Invariance and the Graded Response Model for the COVID-19 Anxiety Scale in a Sample of Ecuadorians
- Rodrigo Moreta-Herrera(corresponding author),
- ,
- Alexandra Salinas,
- Micaela Jiménez-Borja,
- Daniel Gavilanes-Gómez,
- Carlos José Jiménez-Mosquera
- Pontificia Universidad Católica del Ecuador (PUCE),
- Universitat de Girona,
- ,
- ESPOL Polytechnic University,
- Universidad San Francisco de Quito,
- Universidad Técnica de Ambato
Research Output:
Contribution to journal
Article
Peer-review
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Publication Information
Output type
Research Output:
Contribution to journal
Article
Peer-reviewOriginal language
EnglishPages from-to (Number of pages)
Pages 1078-1093 (16 pages)Journal (Volume, Issue Number)
Omega (United States) (Volume 90, Issue 3)Publication milestones
- Accepted/In press - 2022
- Published - 02/2025
Publication status
Published - 02/2025
ISSN
0030-2228Publication IDs
- Scopus: 85134603121
Abstract
The aims of the research are to evaluate the factorial validity, internal consistency, measurement invariance, discrimination, and difficulty of the Covid-19 Anxiety Scale (CAS) applied to a sample of Ecuadorian adults (N = 451). The study is based on an instrumental design with Classical Test Theory (CTT) and Item Response Theory (IRT) technics. The results confirmed the validity of the CAS single-factor structure, with measurement invariance across gender and high internal consistency. Additionally, all CAS items displayed adequate discrimination indexes and proper ordering of the difficulty thresholds. In a conclusion, the CAS is a valid measurement scale for Ecuadorian adults.
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