Ha! Top one is the best - not sure how effective that would be in getting anyone to sleep though...

It's a tricky question - there's no solid data on the awareness of Cognitive Behavioural Therapy but it lends credibility to those who do know it. In our (quick and dirty) research it seems that a majority of our main initial target (middle aged women) have heard about it but don't know what it is...

"Most widely used" seems a bit strong... https://www.google.co.uk/search?q=cbt

(just in the interest of full disclosure, I'm the lead developer for Sleepio)