Depression is the leading cause of disability worldwide, and it can kill. But scientists know surprisingly little about it.

We do know, however, that talking seems to help — especially under the guidance of a licensed mental health professional. But therapy is expensive, inconvenient, and often hard to approach. A recent estimate suggests that of the roughly one in five Americans who have a mental illness, close to two-thirds have gone at least a year without treatment.

Several Silicon Valley-style approaches to the problem have emerged: There are apps that replace the traditional psychiatry office with texting, and chat rooms where you can discuss your problems anonymously online.

http://www.businessinsider.fr/us/stanford-therapy-chatbot-depression-anxiety-woebot-2017-6/