Commitment, Consistency & Influence
Successful Interrogation Methods By Stan Walters
Psychologists have long recognized that one of the most powerful and motivating factors of human action is the desire for consistency which is cemented when an individual makes some form of commitment. Once we have made a choice or take a stand we will convince ourselves we made the correct choice often even in the face of strong external pressures. Our willingness to believe that we made the correct decision when faced with a difficult choice leads us to make subsequent choices consistent with our initial decision. This protects us from having to repeat the same emotionally or even mentally stressing process all over again.
As an interviewer, I can use the power of "consistency" and "commitment" to direct future actions of my subject. If I can get you to make a stand or "go on the record" I have set the stage for nearly automatic consistency with that earlier commitment. From the initiation point of the interview - before I even begin to pursue my construction of proof - I get my subject to start with a statement of commitment. I may work to get you to agree that for the purpose of protecting your best interests you must promise me in some way to tell the truth about all the details.
Another possible commitment technique may be to get my subject to make small commitments to insignificant or minor damaging elements of my case. Perhaps he/she has seen the car in question used in the robbery or perhaps he/she may have even ridden in the car a few times possibly even on the day of the robbery. Perhaps he/she knows the user name and password for her office mate's computer account because it was left out or maybe even used it once to help them out. Perhaps they have been in the house, talked to the victim once, looked in the safe, thought about how "it" could have been done. Once I get a small concession or "commitment" that in some way, no matter how small, I am already on the road to eliciting consistent compliance from my subject.
Look for any subtle method you can use to get even the smallest "commitments" from you subject. You'll find that through the powerful mechanism of the human desire for consistency you'll be on the road to compliance and will get more and faster results from your subject.