# Validating Insomnia Severity Index (ISI) in a Bangladeshi Population: Using Classical Test Theory and Rasch Analysis

> Research article (International Journal of Environmental Research and Public Health, 2021) · cited 35× · AI/ML

**Wikidata**: [openalex:W4200040019](https://www.wikidata.org/wiki/openalex:W4200040019)  
**Source**: https://4ort.xyz/entity/validating-insomnia-severity-index-isi-in-a-bangladeshi-population-using-classical-test-theory-and-rasch-analysis