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Topic 12 (Part 3) : System for computer aided teaching and learning…
Topic 12 (Part 3) : System for computer aided teaching and learning technology
Analysis of data
what information is required
is there a difference
how big is the difference
parametric and non parametric tests mainly address first of these
Think aloud
advantages
simplicity (requires little expertise)
can provide useful insight
can show how system is actually use
disadvantages
subjective
selective
act to describing may alter task performance
user observed performing task
experimental studies on group
choice of task
data gathering
subject group
analysis
cooperative evaluation
both user and evaluator can ask each other questions
additional advantages
user is encouraged to criticize system
clarification possible
less constrained and easier to use
user collaborates in evaluation
automated analysis
advantages
analyst has time to focus on relevant incidents
avoid excessive interruption of task
disadvantages
lack of freshness
may be post-hoc interpretation of events
post task walkthrough
user react on action after the event
used to fill in intention
Protocol analysis
audio
video
paper and pencil
user notebook