Explain in detail the Atkinson-Shiffrin model of memory. (Three Stage Model)

This model is a proposal of the memory structure, it proposes that human memory involves a sequence of three stages:

Sensory Memory: Retain information in a sort of unprocessed way trough a stimulus for less than a second.
Short-Term Memory: Allows us to remember information long enough to use it
Long-term memory: Provides the lasting retention of information.

Memory starts as stimuli that we sense some of it goes into short term, if hold on to it or reherse it in short term then we can move it to long term, so once it gets there that information stays.

The sensory stores are sensory systems, not memory systems as most people think of the term "memory."

The three-box model suggests that there is nothing in between short-term and long-term memory. However, evidence shows that information can reside somewhere between the extremes of active attention and long-term storage. Memories can be "warmed up" but outside of attention. In other words, intermediate levels of activation are possible.

The three-box model implies that there is just one short-term system and just one long-term system. In reality, there are many memory systems operating in parallel (for example, different systems for vision, language, and odor memory). Each has short-term and long-term operations.

The Atkinson-Shiffrin model does not give enough emphasis to unconscious processes. Unconscious activation is shown with a tentative, dotted arrow. Modern researchers find that unconscious and implicit forms of memory are more common than consciously directed memory processes.