Final answer:
The episodic buffer was added to the working memory model to integrate and temporarily store information from different sources, facilitating interactions between other components of working memory.
Step-by-step explanation:
The episodic buffer was added to the working memory model by Baddeley and Hitch (1974) to account for the integration and temporary storage of information from different sources.
It serves as a temporary storage system that can hold both visual and auditory information, allowing for a more comprehensive representation of a current experience or situation.
The episodic buffer acts as a limited-capacity storage system that facilitates the interaction between the other components of working memory, such as the visuospatial sketchpad and the phonological loop.