. expressivespeech.Although the jury may still be out on the debate as to whether the g factor, as gauged by IQ tests, is just one single general intelligence,or whether there are, as Gardner and others suggest,. him to the conclusion that the same peoplewho performed well in a variety of mental tasks tended to use a part of the brain that he termed g.Theg factor, therefore, laid the foundationfor the. example, the more we practise at tests of verbal aptitude, the more we increase ourability to understand the meaning of words and use them effectively; the more we practise at mathematics, the more...