John Gittinger designed the PAS (Personality Assessment System). This is an extraordinary method to evaluate human behavior and predict their future behavior. As far as we know, most of the PAS is still classified SECRET. The PAS is based on the ability to differentiate different types of people.
"Technically, what Edwards was doing was creating conditions that wipe the brain slate clean so that the mind accepts new programming. He would tell those attending, 'You're a sinner! You're destined for hell'"