Correlation Analysis
Lecture 4: Correlation Analysis
Correlation – The relationship between values of paired scores.
Covariation: As we go from one pair to the next, the extent to which variation in the values of one variable is related to variation in values of the other variable.
Correlation analysis A collection of techniques to examine the relationship between paired score values.
Correlation Analysis consists of . . .
1) A tabular technique: The binomial effect size display (BESD)
A 2 x 2 table presenting the relationship of paired scores relative to their respective medians.
| |X less than or equal to median |X larger than median |
|Y larger than median |# pairs in which |# pairs in which |
| |X Median of X’s and |
| |Y > Median of Y’s |Y > Median of Y’s |
|Y less than or equl to median |# pairs in which |# pairs in which |
| |X Median of X’s and |
| |Y ................
................
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