Richard Shiffrin is the Luther Dana Waterman Professor of
cognitive science for the Department of Psychological and Brain Sciences at
Indiana University, Bloomington. Shiffrin has contributed a number of theories of
attention and
memory to the field of
psychology. He co-authored the
Atkinson–Shiffrin model of memory in 1968 with
Richard Atkinson, who was his academic adviser at the time. In 1977, he published a theory of
attention with Walter Schneider. With Jeroen G.W. Raaijmakers in 1980, Shiffrin published the Search of Associative Memory (SAM) model, which has served as the standard model of recall for cognitive psychologists well into the 2000s. He extended the SAM model with the Retrieving Effectively From Memory (REM) model in 1997 with Mark Steyvers.