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# Catalyst – August 5(4), 2009 - PowerPoint PPT Presentation

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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Presentation Transcript

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

You have 5 minutes!

• 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!

• 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)

• SWBAT make a quality hypothesis.

• SWBAT test a hypothesis in an experiment.

• Where have you heard the word hypothesis before?

• What does the word hypothesis mean? Go further than just “educated guess.”

• Key Point #1: Scientists make hypotheses to answer questions they have about the world.

• Remember inferences?

• A hypothesis is a type of inference

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

• 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!

• 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!

• 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!

• 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 would happen if you ate this ice cream?

Why is this man happy?

• 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!

Stroop-a-doop: Let’s model this

• I need 4 volunteers!

RED

BLUE

YELLOW

YELLOW

GREEN

RED

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?

• 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?

• What was the dependent variable in this lab?

• HINT: What did I measure?

• What was the independent variable?

• HINT: What did I change?

• 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.

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

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

• 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?