# The pupil response reveals increased listening effort when it is difficult to focus attention

> Research article (Hearing Research, 2015) · cited 126× · AI/ML

**Wikidata**: [openalex:W2131841400](https://www.wikidata.org/wiki/openalex:W2131841400)  
**Source**: https://4ort.xyz/entity/the-pupil-response-reveals-increased-listening-effort-when-it-is-difficult-to-focus-attention