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Warm-Up

Explore qualities of a good eyewitness, inattentional blindness experiment, spot the difference challenge, and memory quiz to enhance observational skills and understand the reliability of testimony.

cynthiafuller
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Warm-Up

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Presentation Transcript

  1. Warm-Up Make a list of the qualities you think are needed to be a good eyewitness.

  2. Power of Observation Video Experiment

  3. Problem A man is on trial for robbing a convenience store, and several witnesses report seeing him at the scene. During the trial, the defense sets up an experiment to discredit the eye-witness testimony. See how you do on this experiment.

  4. Experimental Video • While you are watching this movie, count the number of times the team in white passes the ball to each other. • Count silently to yourself and make no comments during the movie. http://viscog.beckman.uiuc.edu/grafs/demos/15.html http://www.youtube.com/watch?v=vJG698U2Mvo

  5. Movie Debriefing

  6. How many of you saw something strange during the movie?

  7. Background • Video was made as part of an experiment designed to test people’s “inattentional blindness” • In the original study at Harvard, only 42% of the people noticed the gorilla walking through the scene • This activity illustrates the unreliability of eye-witness testimony

  8. Witnesses vs. Physical Evidence • Most witnesses do not intentionally lie on the witness stand • Human observation is limited by memory, suggestion, and interpretation • Memories can be confused or altered, but physical evidence stays the same

  9. Spot the Difference

  10. Problem • You’ve discovered a problem with the crime scene photos from a recent case. Someone has tampered with the crime scene. See how many differences you can spot between the two photographs of the same crime scene.

  11. How many differences can you spot?

  12. Did you find 5 differences?

  13. I-Witness

  14. Problem • You were the principle crime scene investigator on a case two years ago. • It is now time for you to testify in court about your findings. • The defense attorney challenges the accuracy of your testimony and implies that you observational skills are not so great.

  15. If he can show the jury you are not good at spotting details, he might have a chance of getting his client off. • It is often the case in real life situations that the credibility of expert witness testimony is challenged. • The thoroughness with which they do their jobs is critical.

  16. Can you prove your observational skills are excellent?

  17. Memory Quiz • In your notebook, number your paper from 1-10. • You will have 10 seconds to memorize the following photograph.

  18. You have 10 seconds to memorize the picture below.

  19. 1. What color coffee mug was in the picture? • Blue • Red • Yellow • White

  20. 2. When was the deadline? • Yesterday • Tomorrow • Today • Oct. 19

  21. 3. What time was on the clock on the wall? • 10:40 • 7:20 • 5:38 • 11:05

  22. 4. How many sticky notes were on the whiteboard? • 3 • 6 • 7 • 8

  23. 5. Which of the following was NOT in the picture? • Stapler • Printer • Trash can • Pen

  24. 6. What was the name on the plaque on the desk? • Steve • Brian • David • Jeff

  25. 7. What color was the victim’s shirt? • White • Blue • Red • Green

  26. 8. How many plants were in the picture? • 0 • 1 • 2 • 3

  27. 9. Which of the following was on the floor? • Coffee mug • Plant • Cardboard box • Backpack

  28. 10. Where was the book in the picture? • On the box • On the desk • On the floor • Under the body

  29. More fun at: www.spotthedifference.com

  30. Yellow Today 11:05 6 Stapler Brian Blue 2 Backpack On the box Answers

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