A interview is one that has the potential to bring about strong emotional reactions in the respondent.

A volatile interview is one that has the potential to bring about strong emotional reactions in the respondent.

Explanation:

In the process of investigation or getting certain facts and information from others, investigators tend to 'employ' certain methods or processes of questioning people. This investigative technique allows investigators to get to the inner beings, breaking the 'shell' of the safety limit or space.

In a volatile interview, investigators use techniques that may sound or seem volatile for people but which, basically, has the potential to bring out the true innermost emotional reactions in the respondent. This is done in the questioning or investigative process so that the real truth will be uncovered and that nothing is left uninvestigated.  

answer; i believe that the correct answer is (scientific approach)