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# Our Lying Experiment

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## Emily K

on 14 May 2013

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#### Transcript of Our Lying Experiment

3rd Method:
1.Get 10 people and have them see you one at a time.
2.Tell subjects that none of their answers will get back to teachers, and tell them you’re not even recording their answers.
3.Have them stick their arm (palm up) out along a meter stick.
4.Put a 1 kg weight on their palms and measure how far their arms went down when you asked control questions. (Tell them to tell the truth)
5.Repeat step 3, but ask the actual questions this time. (Assign them truth or lie)
Note: According to this method, if their arm went down about the same amount (1 cm) for the control question as for the actual questions, they were telling the truth, but if the control question measurement was higher than the actual questions, they were lying. 1st Method:
1.Get 10 people and have them see you one at a time.
2.Tell subjects that none of their answers will get back to teachers, and tell them you’re not even recording their answers.
3.Have pre-weighed cups labeled 1-20 waiting with 10 grains of rice in each.
4.Give subject 10 grains of rice to chew on while you are asking the control questions. (Tell them to tell the truth.)
5.Have subject spit rice out into a plastic cup and measure mass.
6.Give subject 10 grains of rice to chew on while asking them actual questions. (Assign whether they are to lie or tell the truth)
7.Repeat step 3.
Note: According to this method, if the control rice gained more mass than the actual question rice did, the subject is lying, but if they both gained the same amount of mass, or if the actual questions gained more than the control, the subject is telling the truth. Our Lying Experiment 1.Get 10 people and have them see you one at a time.
2.Tell subjects that none of their answers will get back to teachers, and tell them you’re not even recording their answers.
3.Ask them control questions (telling them to tell the truth).
4.Escort them to an area where they will be out of sight when you return to your position and tell them that the bowl of water is a chemical that will change color when it interacts with the chemical your body gives out when you lie. Tell them it will take 5 seconds for the water to change color once it is in the water. Tell them they will be rewarded if the chemical doesn’t change color.
6.Record whether their hand is wet or dry.
8.Repeat steps 3, 4, and 5.
9.Give the person a pat on the back as a reward.
10.Have person give you their slip of paper.
Note: According to this method, if their hand is wet, they told the truth, but if their hand is dry they told a lie. 1.Get 10 people and have them see you one at a time.
2.Tell subjects that none of their answers will get back to teachers, and tell them you’re not even recording their answers.
3.Ask them control questions (tell them to tell the truth) and if they display any of the lying signs on the checklist while the control questions are being asked, don’t count them in your checklist for that person.
4.Ask them the actual questions and have one person mark off any signs of lying they are displaying from the checklist. (Assign truth or lie)
Note: According to this method, if they displayed half or more of the signs of lying included on the checklist, they are lying (don’t count the signs that were observed while the control questions were being asked). If less than half of the signs of lying were displayed they were telling the truth. From our results, we can
conclude that Method 1 worked
the best, making our hypothesis
not correct. (We thought method 2- the hand in the water one- would work the best.) We had to take into
consideration all the different por-
tions of data we collected. We had
to consider whether it was better
to accuse an innocent person or to
let a guilty person go free. In the
end, we decided the Chinese(who we
have been on to something. Polygraphs A polygraph is what law enforcement uses to attempt to detect lies. Polygraphs are fairly easy to fool, which is why they aren't accepted as evidence in a court of law, even though they have a 75-90% accuracy rate. Polygraphs measure blood pressure, pulse, etc. There is supposed to be an effect on these aspects on your body when you lie, which is the theory behind polygraph tests. By Bryanna and Emily From Roots to
Results Which of our 4 methods of lie detecting will
work the best? Both of us thought that Method 2 (which will be specified later.)
would work the best because the people could really control that one. Control Questions

Actual Questions

Have you ever cheated on a test? Cheating is looking at someone else’s paper and changing your answer or copying theirs.

Have you ever copied someone else’s homework?

Have you ever lied about homework? Lying about homework is saying you left it at home, but you didn’t actually do it.

Have you ever forged your parent’s signature? Overall, this one had 80% accuracy. Method 2 This had 55% accuracy. This had 55% accuracy. Method 4 If we were able to repeat this experiment, there are a few things that we would change. First, we would eliminate some of the signs of lying from our lying checklist.
Another thing we would change is that we would specify a specific reward (such as candy) to make the incentive greater for the person to not want the chemical to change color.
We believe that if we changed these things, it would produce better results. Lying Checklist
(Signs displayed frequently by liars)
Limited or stiff movements
No direct eye contact
Touching face or hair
Fidgeting
Hesitant speaking
Emotions are delayed, forced(only muscles just around the mouth used), or prolonged
Emotions are not timed with words
Emotions and words don’t match
Goes on the defensive instead of the offensive
Doesn’t use contractions
Statements are implied instead of stated directly