translation.en: And so, to investigate whether this really worked, a learning psychologist did a study with 160 students -- that was from Stanford University and Technical University of Denmark.
translation.zh: 于是为了探究这是否有实效， 一个教育心理学家 对160名学生做了研究—— 这些学生们来自斯坦福大学 和丹麦技术大学。