# Complexity and Difficulty of Items in Learning Systems

> Research article (International Journal of Artificial Intelligence in Education, 2021) · cited 25× · AI/ML

**Wikidata**: [openalex:W3159742274](https://www.wikidata.org/wiki/openalex:W3159742274)  
**Source**: https://4ort.xyz/entity/complexity-and-difficulty-of-items-in-learning-systems