Catalyst â August 5(4), 2009

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Catalyst – August 5(4), 2009. Remember, your groups are in rows – remember your seat! Write down 5 observations about Ms. Stroh. Next, make an inference BASED ON THOSE 5 OBSERVATIONS. You have 5 minutes!. Today’s Agenda. Catalyst Hypothesis Notes Intro to The Stroop Effect Test

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Catalyst – August 5(4), 2009

• Write down 5 observations about Ms. Stroh. Next, make an inferenceBASED ON THOSE 5 OBSERVATIONS.

You have 5 minutes!

Today’s Agenda
• Catalyst
• Hypothesis Notes
• Intro to The Stroop Effect Test
• Perform The Stroop Effect Test
• Independent Work Time: Finish lab report for homework
• Exit Question

Syllabus Quiz Tomorrow!

Exit Questions from Yesterday
• In your own words, describe the difference between an observation and an inference.
• Label the following statements as either observation (O) or inference (I). Don’t write the statements!
• Glue feels sticky. (O)
• Michael Jordan was the best basketball player of all time. (I)
• Talib Kweli writes beautiful lyrics. (I)
• Pickles smell gross! (I)
• Christian hears the bell ringing. (O)
Today’s Objectives
• SWBAT make a quality hypothesis.
• SWBAT test a hypothesis in an experiment.
Think – Pair – Share
• Where have you heard the word hypothesis before?
• What does the word hypothesis mean? Go further than just “educated guess.”
What’s a hypothesis good for?
• Key Point #1: Scientists make hypotheses to answer questions they have about the world.
• Remember inferences?
• A hypothesis is a type of inference
Hypothesis

Key Point #2: A hypothesis is an educated, testable guess.

• Educated = there’s a reason you guess what you guess
• Testable = there’s a way to prove it right or wrong
Example 1
• Question: Will Ms. Stroh run faster than her soccer players if she wears her cleats rather than her tennis shoes?
• Hypothesis: If Ms. Stroh wears her cleats, then she will run faster than her soccer players.
• Is it educated?
• Yes!
• Is it testable?
• Yes!
Example 2
• Is this a good hypothesis?
• Question: Would Lil’ Wayne be as popular as he is now in the 1970s?
• Hypothesis: If Lil’ Wayne was in the 1970s, then he would be just as popular.
• Is it educated?
• Yes!
• Is it testable?
• No!
Example 3 (T-P-S)
• Is this a good hypothesis?
• Question: Do students at West Jeff like green or orange more?
• Hypothesis: Students at West Jeff like green more.
• Is it educated?
• No!
• Is it testable?
• Yes!
Example 4 (T-P-S)
• Is this a good hypothesis?
• Question: Do people prefer Pepsi or Coke?
• Hypothesis: Everyone prefers Pepsi over Coke….duh!
• Is it educated?
• ???
• Is it testable?
• No!

What is this woman thinking?!?!

What would happen if you ate this ice cream?

Why is this man happy?
Example 5 (T-P-S)
• Question: Will using pheromone cologne allow one man to attract more women?
• Come up with a hypothesis with your group.
• Remember….
• It must be educated
• It must be testable
• Question: Does listening to classical music improve student’s performance on tests?
• Come up with a hypothesis on your own.
Stroop-a-doop
• When you first learned to tie shoelaces, you needed to carefully think through each step of the process.
• Now, you probably do not even seem to think about the steps but simply initiate a series of movements that seem to proceed without any further influence. This is called automatization. (Think: automatic)
• Many behaviors can become automatized: typing, reading, writing, bicycling, piano playing, driving, etc.
• To explore properties of automatized behaviors, cognitive psychologists often put observers in a situation where an automatized response is in conflict with the desired behavior
• The Stroop effect
• Stroop (1935) noted that test subjects were slower to identify red ink when it spelled the word blue
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!
Matching Color

RED

BLUE

YELLOW

YELLOW

GREEN

RED

Non-Matching Color

RED

BLUE

YELLOW

YELLOW

GREEN

RED

Stroop-a-doop: Class Discussion
• What was measured in this experiment?
• Dependent variable: time
• What was intentionally changed in this experiment?
• Independent variable: ink color, matching or non-matching
• What things were held constant in this experiment?
• Was your hypothesis right or wrong?
Exit Questions
• What are the characteristics of a good hypothesis?
• Write a quality hypothesis using the following question:
• Will Ms. Stroh’s students achieve higher mastery of GLEs than Mr. LY’s students if they pay attention in class everyday?
Group Chat
• What was the dependent variable in this lab?
• HINT: What did I measure?
Group Chat
• What was the independent variable?
• HINT: What did I change?
Group Chat
• Discuss what is wrong with this conclusion:
• Jeremiah took 8.5 seconds to go through the non-matching list. Therefore, it takes longer to go through the non-matching list than the matching list.
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
• Why are controls necessary in valid scientific experiments?
• If I am testing whether I score more points if I am wearing my Air Jordans in an experiment, what would be a good control group?