If you select for some characteristic, and find that groups differ on other characteristics, it is natural to assume that the variable you selected might be causal. For example, if you select on the basis of genetics, and find differences, it would be understandable if you thought that genetics accounted for the other differences. Equally,... Read More
It is just a coincidence, but the initials NNT are best known to me as Numbers Needed to Treat. This is a measure of the numbers of patients you need to give a drug to in order to get one cure. For example, an NNT of 5 means that you have to treat five... Read More
James Thompson has lectured in Psychology at the University of London all his working life. His first publication and conference presentation was a critique of Jensen’s 1969 paper, with Arthur Jensen in the audience. He also taught Arthur how to use an English public telephone. Many topics have taken up his attention since then, but mostly he comments on intelligence research.