I have been complaining to colleagues about this one for several months. Of the various criticisms of this method, I don’t recall one pointing out this problem. I don’t have time to do some simulations right now, but I did some quick illustrations. The same problem holds for the item-level analyses (these are done using […]

Emil O. W. Kirkegaard1 Abstract Item-level data from Raven’s Standard Progressive Matrices was compiled for 12 diverse groups from previously published studies. Jensen’s method (method of correlated vectors) was used on every possible pair of groups with available data (45 comparisons). The mean Jensen coefficient was about .50. Very few were negative. Spearman’s hypothesis is […]

Found null results for a proposed metric (actually two). In the spirit of publishing failed ideas, I wrote this up. Abstract General intelligence (g) is known to predict grades at all educational levels. A Jensen coefficient is the correlation of subtests’ g-loadings with a vector of interest. I hypothesized that the personal Jensen coefficient from […]