Authors
Jan te Nijenhuis, Michael van den Hoek, Daniel Metzen, Hanna David
Publication date
2017/10/15
Journal
Personality and Individual Differences
Volume
117
Pages
52-59
Publisher
Pergamon
Description
Spearman's hypothesis states that differences between groups on the subtests of an IQ battery are a function of the g loadings of these subtests, and it is virtually always supported. There are anomalies: comparisons for which Spearman's hypothesis shows no supporting evidence. What they all have in common is an unusual Verbal/Performance profile. We carried out meta-analyses for these comparisons: Black and White prisoners, Asians and Whites, and Arabs and Jews in Israel. We carried out three meta-analyses based on, respectively, 2 data points and a total N = 575; 15 data points and a total N = 8100; 5 data points and a total N = 730. In all three meta-analyses Spearman's hypothesis showed no supporting evidence with sample-size weighted correlations with values of, respectively, −.18, .01 and −.24. Correcting for reliability led to similar outcomes. Bypassing the unusual V/P profile by testing Spearman …
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