Lynne M. Reder is an American psychologist and researcher who is an emeritus professor of psychology at Carnegie Mellon University. She served on the faculty of the university until her retirement as a full professor emerita in 2021. Reder's research has contributed to the field of human memory. She has published work related to artificial intelligence and human-computer interaction. Education. Reder received her undergraduate degree in Psychology at Stanford University in 1972, graduating as a member of Phi Beta Kappa. In 1976, she earned her PhD in Psychology from the University of Michigan. After completing an NIMH post-doctoral fellowship at Yale University from 1976 to 1978, she joined the faculty at Carnegie Mellon University, where she served until her retirement in 2021 as a full professor emerita. Selected research and publications. Source of Activation Confusion (SAC) Model of Memory. Reder developed the Source of Activation Confusion (SAC) model, which explains various memory phenomena using activation-based principles.