zlinw@mcmedia.com.au <zlinw@mcmedia.com.au> wrote:

If feedback is required the audience will have to be pressed in some way. A classic method widely used particularly in broadcast radio is to broadcast a delibrate mistake. I have used this in the past under similiar situations, works perfectly.

That's interesting. I suppose the other well established method in broadcast radio is to make controversial statements. It apparently works very effectively.