The study of retention clearly overlaps with the study of memory, but differs in that for information to be viewed as retained, students must be able to recall it when appropriate in response to prompts such as those usually found in schools and not merely in response to experiential cues, such as the smell of freshly baked bread. The study of retention is among the oldest areas of formal study in the science of learning, dating back to Ebbinghaus’s study of spacing effects in the 1880s (Ebbinghaus 1885).
In order to retain information, the information must first be processed into...