Anything calling for an opinion or belief that can change with time or motivation is ruled out as a possible test question, as is anything vague. The pool of questions should focus on a single incident, the facts, and narrowly defined issues of disputed action, not intention. Also, a control question will be developed and selected. A control question is unrelated to any legal issue, but it addresses a related behavior. It's also standard to run through all questions a minimum of three times before a diagnosis is attempted.
Diagnosis is made by verifying other clues and cues with the chart.
A truthful subject's chart will show emotional attention was paid toward the control questions and deflected away from the relevant questions. A deceptive subject's chart will show emotional attention directed toward relevant questions and away from control questions. In cases where the suspect is trying to mislead the examiner because they are trying to feign amnesia, mental illness, or other mental block indicative of confusion, the pattern results are as above, with high- ranging plateaus. It is rare to get this kind of pattern from a truthful subject. Hypnotically induced testimony is inadmissible in court, and hypnotically refreshed or recollected memories are highly controversial.