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Correlation1
Effect Size1
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Journal of Experimental…1
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Goodwin, Laura D.1
Leech, Nancy L.1
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Understanding Correlation: Factors that Affect the Size of r
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Goodwin, Laura D.; Leech, Nancy L. – Journal of Experimental Education, 2006
The authors describe and illustrate 6 factors that affect the size of a Pearson correlation: (a) the amount of variability in the data, (b) differences in the shapes of the 2 distributions, (c) lack of linearity, (d) the presence of 1 or more "outliers," (e) characteristics of the sample, and (f) measurement error. Also discussed are ways to…
Descriptors: Effect Size, Correlation, Influences, Error of Measurement