The best way to ask something form anyone is not to think of what the other person should be replying but to focus on how to structure a question that when answered gives the desired result and/or serves the purpose of the interviewer. Techniques such as barreled questions and loaded questions are very effective in such situations. An interviewer or an interrogator should know how to frame a well structured question.
For this purpose he/she should be well versed in that area plus should also posses the face reading skills and an effective observational attitude to scrutinize and catch each n’ every movement and gestures of the person being interrogated (Gudjonsson, 2003). This serves as an overwhelming factor over the person being interrogated.
The interviewer thus needs to have a strong personality himself so that you can even psychologically force the person to give out the right answer. Whenever we ask a question, we should take care of the following (Gudjonsson, 2003); 1. To have a clear objective in our mind of asking that question. 2. To create the perfectly suitable environment. 3. Use of Spot light (intensity depends upon situation) 4. Explicitly be an “Active Listener”.
The above strategy is the generic theme that is applicable to almost all situations and this skill set helps in interviews and interrogations even when the respondent(s) is/are unwilling to answer a particular set of questions. About informants, the most felt stereotype I think is a lack f trust on them that they might double cross us. This stereotype leads to the fear of being ending up in a trap setup for us and therefore a lot of times we are extra cautious even in the presence of a very old informant.
The second problem is that we also have this in our mind that if the person can let the cat out in front of us than he can tell anyone else too; which might have consequences and therefore this puts another nail into the trust on our informants. This is something very natural and we can actually help it out. This only leads us to be extra cautious from and lack of trust on our informants (Gudjonsson, 2003). References Gudjonsson Gisli H. (2003) The Psychology of Interrogations and Confessions: Wiley.