Before revision: Roger N. Shepard began researching mechanisms of generalization while he was still a graduate student at Yale: "I was now convinced that the problem of generalization was the most fundamental problem confronting learning theory.
After revision: It was introduced in 1987 by, whoRoger N. Shepard began researching mechanisms of generalization while he was still a graduate student at Yale: "I was now convinced that the problem of generalization was the most fundamental problem confronting learning theory.