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.

Objectives

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

Catalyst Review

So, what do you think happened?

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.

Go back to your catalyst

Re-write your hypothesis using the word “because”

Stroop-a-doop

Read the “Procedures” section of the Stroop lab to yourselfWhen you finish, write a hypothesis

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!

Stroop-a-doop: Let’s model this

I need one group to volunteer

Matching Color

REDBLUE

YELLOWYELLOWGREENRED

Non-Matching Color

REDBLUE

YELLOWYELLOWGREENRED

Stroop-a-doop: Let’s model this

Answer the pre-lab questions (questions 1-2)

Group Chat

What was the independent variable?

HINT: What did I change?

Group Chat

What was the dependent variable in this lab?

HINT: What did I measure?

Group Chat

Was there a control in this experiment? Why was it necessary?

Independent time

Each person must turn in a lab report on the Stroop experiment.

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!