Testing long-term memory has dual benefits: It enhances learning and it helps learners discriminate what they know from what they do not know. The latter benefit, known as delayed judgment of learning (dJOL) effect, has been well documented, but in prior research participants have not been provided with test feedback. Yet when people study they…

A study that has uncovered robust memories among former students for material learned in a college course after as long as 11 years is discussed. This is in contrast to the widespread conviction that the passing of years wipes away most recollections of concepts and facts learned in school. (KR)

The question examined in this paper is: what is known exactly about variables that affect long-term retention of knowledge learned in school? U. Neisser (1982) asserts that "it is difficult to find even a single study, ancient or modern, of what is retained from academic instruction." Further, popular belief holds that much of the knowledge…