CBT is a hot topic right now in psychology (ok, maybe, it is gradually becoming cold… :))

Here is some information about it:

http://www.nhs.uk/conditions/Cognitive-behavioural-therapy/Pages/Introduction.aspx

http://www.nhs.uk/Conditions/Cognitive-behavioural-therapy/Pages/How-does-it-work.aspx

https://en.wikipedia.org/wiki/Evidence-based_practice

I like it, because it is a talking therapy technique, it is highly effective, and it has a fixed structure, so it could be easily automated. Yes, it is already automated in some products, but most of them are either ugly or unfriendly, I mean they lack the personal touch which could be emulated using deep-learning and so on.