# The PERMA + 4 Short Scale: A Cross-Cultural Empirical Validation Using Item Response Theory

> Research article (International Journal of Applied Positive Psychology, 2023) · cited 16× · AI/ML

**Wikidata**: [openalex:W4381252376](https://www.wikidata.org/wiki/openalex:W4381252376)  
**Source**: https://4ort.xyz/entity/the-perma-4-short-scale-a-cross-cultural-empirical-validation-using-item-response-theory