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Topic 12: System for computer aided teaching and learning technology,…
Topic 12: System for computer aided teaching and learning technology
Heuristic evaluation critism
Tend to uncover many low-severity problem or issues that aren't really problem
can be often more expensive and difficult to find 3-5 usability professionals as it is to test 3-5 users
model-based evaluation
Cognitive models can be used to filter design option
GOMS (goals, operators, methods, and selection)
model can be used to predict user performance with user interface
Keystroke-level model can be used to predict performance for low-level tasks
Review-based evaluation
It is expensive to repeat experiment continually and review of relevant literature can save resources
Care should be taken to ensure results are transferable to the new design
Experimental results and empirical evidence from the literature
User-based evaluation
Experimental methods:observational methods, query techniques)
Can be conducted in the laboratory and/or in field
evaluation through user participation (evaluation that involve the people for whom the system is intended)
Field studies
Disadvantages
Distraction
noise
Advantages
context retained (though observation may alter it)
Longitudinal studies possible
Natural environment
Appropriate
Where context is crucial for longitudinal studies
Laboratory studies
disadvantages
Lack of context
difficult to observe several users cooperating
appropriate
If system location is dangerous or impractical for constrained single user system, to allow controlled manipulation of use of the system
Advantages
Specialist equipment available
uninterrupted environment
Basyirah binti bahruddin (GB210071)