In 1974, Alan Baddeley and G. J. Hitch developed the first edition of a cognitive model to explain how short-term memory is stored and the active processes involved in working memory. Baddeley wanted a more detailed model than Akinson and Shiffrin’s 1968 multi-store model (Akinson & Shiffrin, 1968) to understand human thought processes involved in short term memory and to connect the behaviour and neural bases leading to the development of the working memory model, also referred to as the multi-component approach to working memory. The working memory model focuses on structures involved in working memory as opposed to processing components. The systems work together to temporarily hold and process new and stored information to perform cognitive tasks. The central executive which is at the top of this model, functions as the homunculus deciding which information to process from the other systems and decides how it should be processed. It is responsible for attention control and providing a bridge between the subsystems and long term memory (Baddeley, 1996). The central executive is responsible for focusing attention with a representation of this function borrowed form the supervisory attentional subsystem (SAS) model (Norman & Shallice, 1986) which accounts for absentmindedness (Reason, 1984) and of attention impairments associated with brain damage to the frontal lobe (Shallice, 1982). It also decides how to divide attention that is processed. The research done with Alzheimer's patients to account for impairments in attention division when dual tasks were performed. Continued research on the central executive lead Baddeley to include the episodic buffer component in 2000 (Baddeley, 2002). Neurological imaging research suggests that bilateral dorsolateral prefrontal cortex, inferior frontal lobe and parietal lobes are all activated by the central executive system (Henson, 2001). The episodic buffer “represents a st