People are playing a role for you when they are applying for a job. They will play a role for you whether you use a test or not. In this situation we will often recommend that the person be re-tested in the future. When this happens we are able describe it and to provide clues as to its source but it does not impact the persons assessment results. Even the most experienced interviewer can be fooled.
Job applicants can play a role that they can pull off for short periods of time.
As an interviewer you have to go by what you see. Unfortunately in many cases the person you see in the interview today is very different from the person you are actually working with in 2,3 or 4 months. Another important point to remember is that even if the assessment confirms everything you saw in your interview, the reports are not meant just as hiring tools. In our promotional literature you will see a description of the 3 report formats-Gold, Silver, and Bronze, along with the specifics of each. See price lists for specifics.