# Erin Gustafson, Ph.D.

Erin Gustafson is a lead data scientist working on assessment, learning analytics, and educational data mining. She holds a PhD in linguistics with a specialization in cognitive science.

**Meaningful metrics: How data sharpened the focus of product teams**  
[Read more here](https://blog.duolingo.com/growth-model-duolingo/)

**How well does Duolingo teach speaking skills?**  
[Read more here](https://blog.duolingo.com/how-well-does-duolingo-teach-speaking-skills/)

**¿Qué tan bien enseña Duolingo a hablar idiomas?**  
[Read more here](https://blog.duolingo.com/duolingo-ensena-idiomas/)