Advantages of diagramming
Advocates of diagrams have suggested that the right hemisphere of the brain is "needlessly at rest and underutilised" when using text-only notation for descriptions.
Research has also shown that some simple visual tasks can require more time when carried out by the left hemisphere.
There are many tasks in which verbal and visual information is combined. Research has shown that memory improves when a concrete image can be associated with a task (e.g. for navigation purposes: route memory depends on visual landmarks)