The Levels of Processing Framework introduced by Craik and Lockhart in 1972 conceives of memory as a result of several processes involved in perception and understanding of information. How much a stimulus is analyzed when a person first learns about it affects how memorable it is. Greater depth in original processing was shown in studies to result in improved memory performance. Within the field of cognitive science, this framework shed light upon the importance of the way information is processed (p. 118). It prompted more research into encoding and retrieval processes following the rejection of the modal model (p. 117).