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Can Facial Expressions Reveal Lies? A Study on Truthfulness and Deception Detection

This project investigates whether facial expressions can indicate if someone is lying. The purpose is to understand the significance of nonverbal cues in trustworthiness assessments. By asking individuals to provide one true and one false statement, we analyze their facial reactions to determine the accuracy of their claims. Our hypothesis suggests that we can decipher lies through expressions, and the results affirm this, showing a 64% accuracy rate in identifying deception based on facial cues. Understanding these indicators can enhance interpersonal communication and trust-building.

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Can Facial Expressions Reveal Lies? A Study on Truthfulness and Deception Detection

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Presentation Transcript

  1. s.t.e.m. fair project

  2. Question • Can facial expressions tell if someone is lying or not?

  3. Purpose • The purpose of my investigation is to determined if watching facial expressions can tell if someone is lying or not. This is important to know because you can tell if you could trust someone.

  4. Hypothesis • I hypothesize that facial expressions can help tell if someone is lying or not. I believe this because someone could be smiling when your telling them something when they lie.

  5. Procedure

  6. Materials • Paper • Pencil

  7. Variable • Manipulated: True or false statement • Responding: Facial expressions used to tell if someone is lying or not • Constant: Number of questions asked and directions given to test subjects

  8. Directions 1. Walk up to a person and ask them to think of two statements about themselves. One should be true and the other should be false. 2. Ask the person to say one of the sentences out loud. Record whether you think the statement was true or false using facial expressions to decide. 3. Repeat step 2 for the second statement. 4. Ask person to tell you which statement was true and false . 5. Repeat steps 1-4 four more times using a different person each. 6. Repeat steps 1-5 for four more trials. 7. Calculate the number of correct and incorrect guesses.

  9. Data chart

  10. Graph

  11. Conclusion My hypothesis was correct. Facial expressions can tell if someone lying. The percentage of identified statements based on facial expressions is 64% correct and 36% incorrect. When someone is NOT telling the truth they can be smiling nervously.

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