"The one-month study collected data from 14 participants" This is a preliminary study. A much wider group of participants is necessary, from a range of backgro

"The one-month study collected data from 14 participants" This is a preliminary study. A much wider group of participants is necessary, from a range of backgrounds and mental health status, before it could be said to 'predict' or 'personalisze' anything. It's good to look at this as a topic. I am sure that my behavior changes when I am depressed and that I would express it first via my phone - after all it is at my fingertips. While I would say that this is very limited in its findings, I hope that there is some further study that expands on this.