Quantoids corner - a note on g and the "method of correlated vectors"

FYI for the quantoid blogsters who do measurement and research with estimates of g (general intelligence). If any quantoid is up to it, please distill the essence of this article into a few sentences and post them to the "comments" section.

Ashtona, M. & Leeb,K.(2005). The problems with the method of correlated vectors. Intelligence, 33, 431–444