A smartwatch app that produces a slow soothing tapping on the wrist seems to help people relax and perform slightly better exams
Source:
https://www.newscientist.com/article/2211056-smartwatch-app-that-soothes-the-nerves-helps-improve-exam-results/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home