The three areas of memory storage according to Atkinson and Shiffrin (1981) are: Sensory memory/buffer, Short-term memory (STM), and Long-Term Memory (LTM).
Sensory memory/buffer is a brief temporary store that holds information from the environment in forms of visual, auditory, tactile, taste or olfactory (smell).
System 1: Automatic, intuitive, effortless, efficient. Employs heuristics (A ‘rule’ used to make decisions or form judgments mental shortcuts that involve focusing on one aspect of a complex problem)
Long-Term Memory (LTM) is a type of memory bank where information that has been memorized and rehearsed becomes stored for an unlimited amount of storage and duration.
The findings of Glanzer & Cunitz (1966) showed that participants were better at remembering words at the start of the list (primacy effect) and end of list (recency effect).
The limitations of the model of Atkinson and Shiffrin (1981) include that it assumes that each of the stores works as an independent unit and focuses on the structure of memory and ignores the role of the depth of information processing.