Renowned psychologist Richard Atkinson, president emeritus of the University of California and professor emeritus of cognitive science and psychology at the UC, San Diego, presents an in-depth exploration of the Atkinson-Shiffrin model, a fundamental theory in memory research. The model proposed memory comprises three components: sensory memory, short-term memory, and long-term memory. Information moves from sensory to short-term memory with attention, and through rehearsal, it can transfer to long-term memory. The model highlighted attention and rehearsal's significance and laid a foundation for memory research, leaving a lasting impact on psychology. (#38852)