Sometimes the simplest tests are the best. When dealing with smokers another little test that I use with them is to ask one key question to assess their attachment and dependency on smoking.

Right at the beginning I say to the smoker "I am going to make a statement and I want you tell me what you feel when I say it. Not what you think, but what you feel. Let your body answer the question." Then I say  'are you ready?', and then I say "You will never smoke another cigarette for the rest of your life".

Then I ask them, 'what came to mind when I said that?'

The answers are often an insight into how that person relates to smoking. Most people say  'relief' but some say 'doubt' or even 'fear'. Many say they got not reaction at all. But when there is a reaction it is a valuable guide to what to look for in their behaviour, and how to continue with the session.