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Johnson, Wendy; Deary, Ian J.; Bouchard, Thomas J., Jr. – Educational and Psychological Measurement, 2018
Most study samples show less variability in key variables than do their source populations due most often to indirect selection into study participation associated with a wide range of personal and circumstantial characteristics. Formulas exist to correct the distortions of population-level correlations created. Formula accuracy has been tested…
Descriptors: Correlation, Sampling, Statistical Distributions, Accuracy
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Mahlios, Marc C.; D'Angelo, Karen – Perceptual and Motor Skills, 1983
Fifth-grade students (n=154) were given the Group Embedded Figures Test. Distribution characteristics and sex differences were examined. Earlier norms developed for adult samples are substantially different from those of a sample of children. The norms presented here provide a guide for identification of field dependence in children. (Author)
Descriptors: Cognitive Style, Cognitive Tests, Group Testing, Intermediate Grades