An historical overview of inductive logic is presented, including the logic of enumerative induction in its rule-derivative and event-predictive forms. An experimental test model of event-predictive induction in the linguistic medium is discussed along with its theoretical significance for future psychometric investigations. (Author/CM)

This study evaluated the diagnostic validity of a task measuring abstract categorization ability in learning disabled (LD) and non-LD children. Data showed that the component of abstract category knowledge that best disciminates LD children from non-LD, is the knowledge of how members of abstract categories differ from each other. (Author/JAZ)