1. What are the Variables?

2. What is an independent variable?

3. What is an independent variable?
An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

4. What is a dependent variable?

5. What is a dependent variable?
A dependent variable is the variable being tested and measured in a scientific experiment.

6. Demo

7. Is there a relationship between extraversion and the number of “friends” that you have?

8. Extroversion Number of friends
Is there a relationship between extraversion and the number of “friends” that you have?
What are we measuring? (IV)
How are we measuring it? (DV)
Extroversion
Number of friends

9. Introvert/Extrovert Quiz
Take out a piece of paper, and label it 1-10.
Answer each question True or False, choosing the answer that applies to you more often than not.

10. 1. I prefer one-on-one conversations to group activities.

11. 2. I often prefer to express myself in writing.

12. 3. I enjoy solitude.

13. 4. I seem to care about wealth, fame, and status less than my peers.

14. 5. I dislike small talk, but I enjoy talking in-depth about topics that matter to me.

15. 6. People tell me that I'm a good listener.

16. 7. I'm not a big risk-taker.

17. 8. I enjoy work that allows me to "dive in" with few interruptions.

18. 9. I like to celebrate birthdays on a small scale, with only one or two close friends or family members.

19. 10. People describe me as "soft-spoken" or "mellow."

20. Count the number of statements that you answered FALSE and write this number down.
Using your laptops or smartphones, log onto Facebook and write down the number of “friends” that you have.

21. Results
Use the excel file titled “MiniLesson_Variables_Extroversion_&_FBFriendship_Scatterplot.xlsx” to tabulate the class results.

22. Interpretation of Results
What did we find?
Validity?
Reliability?
Confounds?
What is wrong with this study?