title: G is about variance not contents.
authors.affiliation: k.richardson@open.ac.uk
authors.forename: Ken
authors.initials: K
authors.lastname: Richardson
mesh_terms: D000704:Analysis of Variance; D003071:Cognition; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests / Q000706:statistics & numerical data; D009483:Neuropsychological Tests / Q000706:statistics & numerical data; D011582:Psychological Theory; D011594:Psychometrics / Q000379:methods / Q000706:statistics & numerical data*