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Human–ComPuter InteraCtIon
short-term memory beyond this capacity for fast operation. Imagine
an interface with a large number of options or menu items. e user
would have to rescan the available options a number of times to make
the final selection. In an online purchasing system, the user might
not be able to remember all of the relevant information such as items
purchased, delivery options, credit card chosen, billing address, usage
of discount cards, etc. (Figure3.4). us such information will have
to be presented to the user from time to time to refresh one’s memory
and ensure that no errors are made.
Retrieving information from the lo ...