Term
| What is the seven stages of action model? |
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Definition
| Model describing how people do things |
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Term
| Explain the seven stages of action model |
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Definition
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Term
| What are gulfs of execution and gulfs of evaluation? |
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Definition
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Term
| At what point can the seven stages of Action start? |
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Definition
| at form the goal, or at the world |
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Term
| Can the seven stages of action be hierarchical? |
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Definition
| Yes, a point can have a seven stages of action model in itself |
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Term
| What kind of errors do exist? |
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Definition
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Term
| Explain rule based mistakes: |
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Definition
- Scenario has a known procedure (rules)
- If.. then..
- Rules may be written-down or from experience |
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Term
| Give an example of a rule-based mistake |
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Definition
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Term
| How to prevent rule-based mistakes |
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Definition
- Provide guicance
- Make state of the device easy to understand
- Foster appropriate conceptual models |
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Term
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Definition
Same starting steps, later steps diverge
- More prevalent in skilled actions |
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Term
| Description- similarity slips |
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Definition
| The action sequence is formulated too vaguely or caused by tiredness, stress, cognitive overload |
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Term
| How to prevent capture slips |
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Definition
| - Prevention: avoid forking action sequence |
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Term
| How to prevent description-similarity slips |
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Definition
| Ensure that controls and displys for different purposes are significantly different from each other |
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Term
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Definition
Interruption or multitasking shifts the locus of attention away from the task
-> Forgot to act, evaluate or form a subsequent goal |
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Term
| How to prevent memory-lapse |
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Definition
| Provide vivid remember, minimize number of steps, forcing functions |
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Term
| What is the locus of attention? |
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Definition
Whaterver you are intnently and actively thinking about
- You have only single locus attention
- You cannot completely control your locus of atttention
- You cannot stop the current action if it is outside your locus of attention |
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Term
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Definition
| When a device has different states in which the same controls have different menaings. These stats are called modes |
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Term
| How to prevent mode errors? |
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Definition
| avoid moddes / make users aware of the current mode |
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Term
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Definition
| keeping a mode in place only through constant action from the user (e.g. Ctr., Alt) |
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Term
| Difference between mistakes and slips: |
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Definition
Mistakes:
- results form conscious deliberation
- Subsequent actions may be properly executed
Slips:
- Mostly subconscious
- Frequently occurred in skilled actions |
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Term
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Definition
| Several conditions have to be aligned so an accident can occur. |
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Term
| How to prevent accidents in the swiss cheese model |
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Definition
- add more slices
- reduce the number or size of holes,
- alert human operator when holes line up |
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Term
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Definition
| Use a set of design principles to judge a user interface |
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Term
| What are good evaluators for heuristic evaluation? |
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Definition
| Double experts (HCI & domain) are best evaluators, novices are poor evaluators |
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Term
| Procedure in heuristic evaluation |
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Definition
- First-pass: use the UI to get a feeling
- Second-pass: focus on specific elements & identify problems
- Take notes
- Classify issues based on severity |
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Term
| When is heuristic evaluation a good idea? |
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Definition
| - When finding minor, detailed usability problems, therefore better in mid- or high-fid protoypes |
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Term
| What is the recommended evaluation method? |
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Definition
Alternate heuristic evaluation and user testing
- Weed out basic mistakes -> avoid wasting testers time |
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