$1\mathrm{.}4$ What are mental models, and why are chey imporcant in interface design?

$11\mathrm{.}5$ What can a system designer do to minimize the memory load of che user?

$1\mathrm{.}6$ Human short$-$term memory has a limited sppan. This is a series of experiments co dete

that span is$.($You will need some other people to take part in these experiments with

do not need to be studying the course $-$ try it with a group of friends.$)$