Let Their Words Do the Talking

Verbal Cues to Detect Deception

Poor Man's Polygraph Part 5

The next time you purchase a product or service use the Poor Man’s Polygraph to give yourself a degree of confidence that you are not being cheated.  Read More

Cognitve overload

Your techniques offer a (mostly) fool proof method for detecting cognitive overload. It's less clear that detection of cognitive overload is the same as detection of lying.
Part 4 stands out to me as extremely weak. Someone who answers "I don't care if you believe me." may just be socialized in a way we are not used to. Most people are pack animals and want to please. Some people do not learn the same socialization as the pack and really don't care if you believe them or not, even when they do tell the truth. Someone who has been through a course of psychoanalysis might respond with "I don't control what you believe; it is up to you to decide to believe me or not."

I agree

Your observations are on target. Unfortunately, detecting deception remains a difficult task. No one verbal or nonverbal cue signals deception. Likewise, no one deception detection technique works all the time. Some of the techniques are more efficient than others as you pointed out. I advocate using the cluster method, which usually filters out idiosyncratic behaviors. In my experience, the combination of the 5 Poor Man's Polygraph techniques provides a good indication if someone is telling the truth or not. However, you always have to keep in mind that sometimes honest people say and do things that make them look guilty and guilty people say and do things that make them look guilty.

What about people who are under habitual psychological pressure?

I think most people who were abused or who suffered at the hands of a manipulator would fail most or all of the 5 Poor Man's Polygraph techniques.

Also, I suppose an introvert, nerdy, engineer or science-type with some lack of social graces and a need to be accurate and precise to a point of being pedantic would fail at least 3 of the Poor Man's Polygraph techniques.

If you previously "read" the person by trying to get to know something of his/her background you can probably adjust for that, and I do believe that these techniques can be useful. But I really hope parents, bosses and general people in authority who read this understand that some people just have a different way of speaking and reacting...

"I refuse to answer any of

"I refuse to answer any of your questions"
is always the best answer.

It's the best answer...

If you are guilty. Once again we have to read the comments of a liberal who thinks they are more powerful in the law.

*than

*than

Actually no. There are

Actually no.

There are numerous accounts of innocent people being convicted of a crime just becuase they spoke to the police.

Guilty until proven innocent is the above posters mindset, and that's just wrong.

Ill give you four very valid reasons why you never answer any questions.

1) The police can lie to you legally. There is no reason why you should believe anything that comes out of a police interrogators mouth, ever.

2) It is illegal to lie to the police. You may think you are answering a question truthfully when it's very possible that you forgot about certain things. If evidence is then uncovered that proves your version wrong, you're in trouble.

3) Anything that you say can be used against you in court. However, nothing that you say can be used to assist you in court. It is a no win situation for you since anything you say can never be used to help you, ever.

4) With the ever growing large number of crimes that can be broken, along with the most obscure laws that are on the books that you don't know about, it is very possible that you will admit to breaking the law by revealing day to day activities that no one with half a brain would even think was illegal.

These aren't 'Liberal' ideals. These are the most conservative ideals known to man.

You are innocent until proven guilty.
It is their job to prove you guilty.
You gain zero benefit what so ever by participating any any discussion with any law enforcement investigator and more importantly you have no legal obligation to participate.

Very concise summary of the

Very concise summary of the risks of speaking with the police.

I hope you don't mind I saved the post for future reference.

Thanks for dropping some knowledge

This is something I think people need to be more aware of. There is a lot of pressure for police to obtain a confession if they believe the suspect is guilty. Excessively intense interrogations can have a brain washing effect on certain vulnerable individuals and lead innocent people to a guilty verdict effectively eliminating their Constitutional right to remain innocent until proven guilty. This has nothing to do with partisan politics and everything to do with justice.

Oh really...

It's good to know, then, that the 4th and 5th Amendments to the US Constitution only apply to liberals.

Or, it could be that there are many mental flaws that lead people to give up false information that is incriminating, even confessions, under duress. Keeping your mouth shut (after "I am exercising my right to remain silent") is one way to try to keep yourself out of jail, whether innocent or not.

Interesting Piece

as much as I want to use everything you have said here for the greater good, I fear all I've learnt is how to be a better liar.

"The failure to respond

"The failure to respond "Because I'm telling the truth or some derivation thereof increases the probability of deception. Failing to provide the correct response to the question "Why should I believe you?" is only one indicator of deception, not proof of deception."

This could not be more wrong. It states that there is but one correct answer to the the question of "Why should I believe you" which is patently false. If it were true, then it would be a indicator of deception 100% of the time.

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John R. "Jack" Schafer, Ph.D., earned his degree in psychology from Fielding Graduate University, Santa Barbara, California and served as a behavioral analyst for the FBI.

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