1. Factorial Validity, Reliability, Measurement Invariance and the Graded Response Model for the COVID-19 Anxiety Scale in a Sample of Ecuadorians.
- Author
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Moreta-Herrera R, Caycho-Rodríguez T, Salinas A, Jiménez-Borja M, Gavilanes-Gómez D, and Jiménez-Mosquera CJ
- Subjects
- Humans, Female, Male, Adult, Reproducibility of Results, Ecuador, Middle Aged, Young Adult, Factor Analysis, Statistical, Aged, SARS-CoV-2, Surveys and Questionnaires standards, Adolescent, South American People, COVID-19 psychology, Psychometrics, Anxiety psychology
- 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., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
- Published
- 2025
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