ERIC Number: ED129576
Record Type: RIE
Publication Date: 1976-Apr
Reference Count: 0
An Empirical Study of the Pseudo-Paradoxical Effect on Correlation of Extreme Univariate Selection in the Three-Variable Case.
Biggs, Jon S.; Whitehead, Gary R.
Five three-variable combinations were obtained from a variety of standardized test scores of 331 male children. These five groups were treated as unrestricted populations of the case III variety. Extreme univariate selection was produced in each group allowing for tests of differences between the correlation values of the two incidental variables in the restricted and unrestricted groups and between the predicted correlation of incidental variables in the restricted sample and the actual value. Results indicated that the case III correction formula is appropriate under conditions of extreme univariate selection and that restriction of range does not invariably decrease correlations. (Author/SD)
Publication Type: Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Note: Paper presented at the annual meeting of the American Educational Research Association (San Francisco, California, April 19-23, 1976); Not available in hard copy due to marginal legibility of original document