Chapter 46 - 16 Flashcards
(17 cards)
Why do we evaluate?
To check users’ requirements.
To confirm that users can utilise the product and that they like it.
What do we evaluate?
A conceptual model.
Early prototypes of a new system.
Where do we conduct the evaluation?
In laboratory settings.
Natural setting.
When do we evaluate?
Throughout the design.
Finished products to collect information to inform new products.
List the 3 evaluation approaches. CNA
Controlled setting with users.
Natural setting with users.
Any setting that doesn’t involve users.
List the evaluation methods.
Observing.
Asking users.
Asking experts.
Usability testing.
Modelling.
List the content of informed consent.
Purpose of the study.
Participant’s responsibility in the study.
Explanation of how the study will be performed.
Ensure the participant that he/she will not be harmed.
Ensure participants’ privacy.
Ensure participants that they can withdraw at any time if they do not feel comfortable participating.
Covid-19 sanitizing compliance.
A statement that they understand everything and are willing to
participate.
Signed by both facilitator and participant and dated.
Explain how to do usability testing in a controlled environment.
Involves recording the performance of typical users doing typical tasks in controlled settings.
The data is used to calculate performance times and to identify and explain errors.
List some qualitative performance measures.
Time to complete a task.
Number of users completing a task.
Number and type of errors per task.
Number and type of errors per task
List the usability testing conditions.
Controlled space.
30-minute task.
5 -10 Selected users.
Same test condition for every participant.
Compare between Usability Testing and Experimental Research.
Usability Testing:
few participants.
planned procedure.
improve products.
Experimental research:
many participants.
experimental design.
discover knowledge.
Describe how to do field studies.
Field studies are done in natural settings to:
– understand what users do naturally.
– how technology impacts them.
What are “in the wild” studies?
Field studies that involve the deployment of prototypes or technologies in natural settings
List the 2 types of inspection methods.
Heuristic evaluation.
Walkthrough.
cognitive walkthrough - without users
pluralistic walkthrough - with users
Explain what a heuristic evaluation entails.
A guideline used to verify and identify problems.
What are predictive models?
Provide a way of evaluating products or designs without directly involving users.
Explain Fitts Law.
Fitts’ Law predicts that the time to point at an object using a device is a function of the distance from the target object and the object’s size.
The further away and the smaller the object, the longer the time to
locate it and point to it
* It is particularly useful for determining where on a screen to position an
object
* Fitts’ Law is useful for evaluating systems for which the time to locate
an object is important, for example, smartphones, handhelds, and
mobile devices
