Psychlaw, RE: Central executive.
If you look in the 2007 Assessment Report, it sets out the functions and examples of each very clearly, which I found to be useful.
In fact, I'll just copy it here:
The ‘central executive’ is responsible for:
• integrating information from the phonological loop and visuo-spatial sketchpad; for example, in reading where
a word is identified and sounded
• communicating with long-term memory in terms of retrieving information required; for example, when
multiplying 7 × 43. This requires access to the seven times table from long-term memory
• communicating with long-term memory in terms of assigning meaning in order to commit material to long-
term memory
• planning a course of action to solve a problem; for example, deciding how to open a door when one has one’s
hands full of shopping bags
• deciding which items require attention and which are to be ignored; for example, picking out relevant stimuli
when searching a location in a street-directory.
http://vcaa.vic.edu.au/vce/studies/psychology/assessreports/2007/psychology2_assessrep_07.pdf