# Measurement of functional task difficulty during motor learning: What level of difficulty corresponds to the optimal challenge point?

> Research article (Human Movement Science, 2015) · cited 85× · AI/ML

**Wikidata**: [openalex:W1118443095](https://www.wikidata.org/wiki/openalex:W1118443095)  
**Source**: https://4ort.xyz/entity/measurement-of-functional-task-difficulty-during-motor-learning-what-level-of-difficulty-corresponds-to-the-optimal-chal