>if the items are to measure intelligence, they must all possess certain abstract properties, described by Spearman as presenting the possibility for eduction of relations and correlates. This has much the same meaning as inductive ("relations") and deductive ("correlates") reasoning. Eduction of relations means inferring the general rule from specific instances (i.e., induction). Eduction of correlates means making up or recognizing a specific instance when given one other specific instance and the general rule (i.e., deduction).<

Arthur R. Jensen, 1980