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Play to Learn
Goal(s): When evaluating a Pearson's r value, gauge its strength as strong, medium, or weak.
How: You will be shown two examples at a time, drawn from a collection of Pearson's r values and scatter plots. Select the weaker correlation. Make 30 quick decisions, with immediate feedback.
Site: P2L.io
About
About
Strength of Correlation. When determining the strength of a correlation, ignore the sign (positive or negative). Rather, the weaker the correlation, the closer the Pearson's r value will be to zero. For a Pearson's r value of zero, there is no relationship between the two variables (e.g., number of letters in your name and your height). The stronger the correlation, the closer Pearson's r will be to either +1.00 or -1.00.
A correlation may be labeled as weak, moderate , or strong. Please note that the definitions provided here for weak, moderate, or strong correlation are not universal; it is a good idea to check that others share your definitions for these terms.
To label a correlation, it is important to understand absolute value and the "≥" and "≤" signs.
Absolute value conveys magnitude, and is always positive. It is an easy way of saying to ignore the sign (+ or -), and treat all values as though they were positive. For example, |-.83| = +.83, and |+.83| = +.83. When we use absolute value, it is like taking an axe and cutting off the sign of a value.
Additionally, note that the sign "≥" means greater than or equal to. It is true that 5 ≥ 4, and that 4 ≥ 4. The sign "≤" indicates less than or equal to. It is true that 2 ≤ 3, and that 3 ≤ 3.
Strong Correlation
Strong Correlation
Definition: |r| ≥ .70
The Pearson r value, ignoring the sign, will be .70 or greater.
Examples: r = .70, r = -1.00
Moderate Correlation
Moderate Correlation
Definition: .30 < |r| < .70
The Pearson r value, ignoring the sign, will be more than .30 and less than .70.
Examples: r = .31, r = -.69
Weak Correlation
Weak Correlation
|r| ≤ .30
The Pearson r value, ignoring the sign, will be less than or equal to .30.
Examples: r = .30, r = -.09
Note: If r = 0, we would refer to it as being a zero correlation (i.e., no correlation at all).
Game
Optional: Earning Class Credit
To earn credit for this activity:
Click the 'Accommodations' button on the game menu.
Using the number pad (in the Accommodation dialog box), type the passcode provided by your instructor.
Click the 'Continue' button. Doing so will return you back to the game menu.
Then click 'Start' to begin the game.
When you complete the task with a score of 85% or greater, you will be given a completion code. To view this completion code, click on the 'Completion Code' button.
To get credit for having completed the activity, provide the completion code as your answer (e.g., to a quiz question). If the completion code is not yet available (e.g., performance was less than 85%), then click the 'Continue' button to re-do the activity.
Accommodations include:
Screen Reader (click the 'Screen Reader' button)
Unlimited decision time (e.g., Click the 'Accommodations' button, then type #17 by itself or at the end of a passcode. Click 'Continue').
Please notify your instructor if requesting these accommodations.
Instructors can modify games and set up quizzes rather easily. Check out game modifications.
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