The Atkinson-Shiffrin model, proposed by Richard Atkinson and Richard Shiffrin in 1968, describes how information is processed in the human memory system. It consists of three main components: sensory memory, which briefly holds incoming sensory information; short-term memory, where information is actively processed and can be held for a limited time; and long-term memory, which stores information more permanently for later retrieval. In this model, information flows sequentially from sensory memory to short-term memory, and then to long-term memory. The effectiveness of this transfer can be influenced by factors such as attention and rehearsal, which help encode information into long-term memory for future use.