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August 24, 2009

August 24, 2009. Catalyst Over the weekend, Andreas lost his new iPhone. Today, Courtney came to school with a brand new iPhone. As you walked to class, you overheard Courtney whispering to someone about how “lucky” she was to “win” something, but you could not make out anything more.

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August 24, 2009

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  1. August 24, 2009 • Catalyst • Over the weekend, Andreas lost his new iPhone. Today, Courtney came to school with a brand new iPhone. As you walked to class, you overheard Courtney whispering to someone about how “lucky” she was to “win” something, but you could not make out anything more. • Write a hypothesis about how you think Courtney got her new iPhone.

  2. Objectives • By the end of class, SWBAT… • Make quality hypotheses • Test a hypothesis in an experiment

  3. Catalyst Review • So, what do you think happened?

  4. Hypotheses are EDUCATED guesses • A lot of students have had trouble understanding when a hypothesis is educated, and when it is not. • From now on: always include the word “because” in your hypothesis. • A hypothesis is educated if there is a reason to believe it. • If you write “because” then you are supplying a reason, so your hypothesis will ALWAYS be educated.

  5. Go back to your catalyst • Re-write your hypothesis using the word “because”

  6. Stroop-a-doop • Read the “Procedures” section of the Stroop lab to yourself • When you finish, write a hypothesis

  7. Stroop-a-doop: Roles • In this lab, there are 4 positions: • Time Keeper • Test Subject • Test Proctor • Signal Giver • Each person will get an opportunity to be each role!

  8. Stroop-a-doop: Let’s model this • I need one group to volunteer

  9. Matching Color RED BLUE YELLOW YELLOW GREEN RED

  10. Non-Matching Color RED BLUE YELLOW YELLOW GREEN RED

  11. Stroop-a-doop: Let’s model this • Answer the pre-lab questions (questions 1-2)

  12. Group Chat • What was the independent variable? • HINT: What did I change?

  13. Group Chat • What was the dependent variable in this lab? • HINT: What did I measure?

  14. Group Chat • Was there a control in this experiment? Why was it necessary?

  15. Independent time • Each person must turn in a lab report on the Stroop experiment.

  16. Exit Questions • Write a hypothesis to explain whether you think young people or old people would be faster at reading non-matching words in the Stroop lab. • Keep in mind what we learned earlier about how to write educated hypotheses!

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