期刊
JOURNAL OF EXPERIMENTAL EDUCATION
卷 74, 期 3, 页码 251-266出版社
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.3200/jexe.74.3.249-266
关键词
correlation; errors; interpretation; Pearson product-moment correlation
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 determine whether these factors are likely affecting the correlation, as well as ways to estimate the size of the influence or reduce the influence of each.
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