# Farrah Neumann, Ph.D.

Farrah is a Learning Scientist with a Ph.D. in Hispanic Linguistics. She is an expert in second language acquisition and speech sound learning, with experience teaching Spanish and Linguistics.

## Articles Written by Farrah Neumann, Ph.D.

### [Dear Duolingo: How can I learn Chinese tones?](https://blog.duolingo.com/chinese-tones/)
*Published: Apr 28*  
*Author: [Farrah Neumann, Ph.D.](https://blog.duolingo.com/author/farrah/)*

### [Comment mesure-t-on l’efficacité de nos cours chez Duolingo ?](https://blog.duolingo.com/cadre-efficacite-chez-duolingo/)
*Published: Jan 22*  
*Author: [Xiangying Jiang, Ph.D.](https://blog.duolingo.com/author/xiangying/)*

### [¿Cómo evalúa Duolingo su eficiencia?](https://blog.duolingo.com/como-evalua-duolingo-su-eficiencia/)
*Published: Nov 27*  
*Author: [Xiangying Jiang, Ph.D.](https://blog.duolingo.com/author/xiangying/)*

### [Como o Duolingo avalia a eficácia do ensino?](https://blog.duolingo.com/como-duolingo-avalia-eficacia-do-ensino/)
*Published: Nov 18*  
*Author: [Xiangying Jiang, Ph.D.](https://blog.duolingo.com/author/xiangying/)*

### [D⁠u⁠o⁠l⁠i⁠n⁠g⁠oの学習効⁠果は⁠、どのように評価されている⁠？](https://blog.duolingo.com/how-duolingo-evaluates-effectiveness/)
*Published: Nov 11*  
*Author: [Xiangying Jiang, Ph.D.](https://blog.duolingo.com/author/xiangying/)*

### [Wie bewertet Duolingo seine Wirksamkeit?](https://blog.duolingo.com/duolingo-wirksamkeit-rahmenwerk/)
*Published: Oct 30*  
*Author: [Xiangying Jiang, Ph.D.](https://blog.duolingo.com/author/xiangying/)*