Atkinson and Shiffrin are known for their influential model of memory, proposed in 1968. Their model describes memory as consisting of three main components: sensory memory, short-term memory, and long-term memory. Each component plays a crucial role in how information is processed and stored in the brain. The model suggests that information first enters sensory memory, where it is briefly held before being transferred to short-term memory for further processing. If the information is rehearsed or encoded, it can then move into long-term memory, where it can be stored for extended periods. This framework has significantly shaped our understanding of memory processes.