Week 10

Question 1

What are the steps for controlled experiments?

Answer 1

First step: What is it that you want to evaluate? This is called the “dependent”

Second step: How are you going to measure the difference? These are the “independent” variables

Third step: Careful design of the experiment, so as that we avoid learning effects, the effects of different tasks, the effects of background knowledge etc. These are called “confounding” variables

Fourth step: “Within subjects” (each participant will participate in all conditions, e.g. will interact with the two website designs)

Fifth step: Analyse data using statistics

Question 2

What are the expert evaluation methods?

Answer 2

Heuristic evaluation

Discount usability engineering

Cognitive walk through

Question 3

What are the participant based approaches?

Answer 3

Cooperative evaluation

Participatory heuristic evaluation

Controlled experiments

Question 4

What are types of evaluation where you don’t have to be there?

Answer 4

Online questionnaires

Crowd sourcing

Web-based apps

Log file examination

Tools: e.g. Google Analytics

Question 5

What is participant-based evaluation

method?

Answer 5

work domain experts are involved alongside usability experts