# The ratio effect in visual numerosity comparisons is preserved despite spatial frequency equalisation

> Research article (Vision Research, 2021) · cited 10× · AI/ML

**Wikidata**: [openalex:W3134469607](https://www.wikidata.org/wiki/openalex:W3134469607)  
**Source**: https://4ort.xyz/entity/the-ratio-effect-in-visual-numerosity-comparisons-is-preserved-despite-spatial-frequency-equalisation