Evaluation Flashcards
What is the high level overview of evaluation?
detailed discussion on specific topics
- analytical evaluation
- usability evaluation
- experiments
Why evaluate?
What are the evaluation considerations?
There are a range of evaluation methods and settings
Your choice of method should be informed by the following:
- Why
- What
- Where
- When
Evaluation considerations: Why? Why evaluate?
Evaluation Considerations: What
Evaluation Considerations: Where
In general, when should evaluation occur?
Throughout the design process, from the first descriptions and sketches through to the final product.
What are the other evaluation considerations?
And Stackeholders:
- Management
- Actual Users
- Maintainers
- Others impacted
What are the general evaluation types?
How do evaluation types complement one another?
What are the participants rights?
Once we’ve completed the research, what do we do with it?
Why does Data analysis and Interpretation get tricky?
If you don’t plan appropriately, your data can be meaningless, or worse, you may interpret it incorrectly, e.g., that your interface works when it doesn’t
What are the Evaluation overview key points?
In general, what are Analytical Evaluations?
Evaluations without involving users
Experts assess the system using structured techniques known to be effective at uncovering usability flaws
theoretical models of human performance can predict actual use
What are the Analytical Evaluation Types?
What are the Analytical Evaluation Inspections?
What are Cognitive Walkthroughs
“Cognitive walkthroughs simulate a user’s problem-solving process at each step in the human-computer dialog, checking to see if the user’s goals and memory for actions can be assumed to lead to the next correct action”
What is the process for Cognitive walkthroughs?
Why is the process of Cognitive Walkthroughs tedios?
force you to consider every component, every step, from the user’s perspective
avoid “glossing over” the details because you get it
tried-and-true process for overcoming “designer blindness” – you can’t see the problems with things you’ve made
How do you get results form conginitive walkthroughs?
Through the process, information is recorded on:
Assumptions about what would cause problems and why (involves explaining why users would face difficulties)
Notes about side issues and design changes
Results are summarized
design is revised to fix problems identified
What is a Heuristic Evaluation?
define: heuristic
a rule of thumb—a principle that is a shortcut for solving a problem or making decisions
not always right/true, but cognitive shortcuts
design heuristics
broad usability guidelines that can guide a developer’s design efforts
derived from common design problems across many systems
several researchers and practitioners have developed different sets of heuristics (e.g. domain specific)
What is the general process for Heuristic Evaluation?
Systematic inspection of an interface design to see if an interface complies with a set of usability heuristics, or usability guidelines.
General process:
» 3-5 inspectors (usability engineers, experts…)
» inspect interface in isolation (~1-2 hr for simple interfaces)
» results are aggregated afterwards
single evaluator catches ~35% usability problems 5 evaluators catch ~75%
How does the proportion of usability problems found work?>
In general what is Nielsen’s Heuristics?
Nielsen’s Heuristics: Background
Developed by Jacob Nielsen in the early 1990s
Based on heuristics distilled from an empirical analysis of 249 usability problems
These heuristics have been revised for current technology
Heuristics still needed for some emerging technologies (e.g., mobile devices, AR, etc).
Design guidelines form a basis for developing heuristics