Requirements: Non-directive interviews

Reading the Economist's article "The avatar will see you now" I came across:

"Meanwhile, a real person alongside the participant will answer any questions and, after the virtual visit is over, Dr Conboy-Hill will carry out “non-directive” interviews, a technique used by the police to encourage witnesses to choose what they want to talk about and to maximise recall"

What interested me was the snippet about "non-directive" interviews - it sounded like a technique that might be worthwhile for requirements gathering - I subsequently found "ACTIVE LISTENING IN THE NONDIRECTIVE INTERVIEW" which I think there are a few tricks worth picking up - especially rephrasing and the "brake shoes"...

of course I'm a sucker for any document that uses the word "interlocutor" ;-)