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Cognitive Walkthrough (Model (complete action and see if they have moved…
Cognitive Walkthrough
Model
GOMS structure
initial goal constructed from a description of the user's task
learn by exploration
complete action and see if they have moved closer to the goal
succesful actions will be stored
Design
good interface is one where the user can guess what to do
always provide a route back / undo
few alternatives
more choice increases difficulty
Preperation
task description
assumptions about starting conditions
correct optimal sequence of actions
users
user population
knowledge and skills
startup sheet
task description
action sequence
aniticipated users
users initial goal
Approaches
focus on specific task
theory based
task oriented
for each action
consider the goals
match between what they currently have to the ones they actually have
executing
what difficulties do they have
time out issues
are wrong choices available
get the percentage of each
establishing new goals
how does the system respond
will users quit or undo at this point
will it be clear to the user what they have established
evaluation
time
consistency between evaluators