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Gulfs of Execution and Evaluation

Gulfs of Execution and Evaluation. A Bad Day for an Object. User can’t act and can’t think Broken mapping Can’t achieve goals No feedback. How people interact with objects. Have a goal Have ability to ACT Evaluate actions Did ACT=>GOAL?. Let’s draw: Human Action Cycle. GOAL. Act.

thomas-williams
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Gulfs of Execution and Evaluation

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  1. Gulfs of Execution and Evaluation

  2. A Bad Day for an Object • User can’t act and can’t think • Broken mapping • Can’t achieve goals • No feedback

  3. How people interact with objects • Have a goal • Have ability to ACT • Evaluate actions • Did ACT=>GOAL?

  4. Let’s draw: Human Action Cycle GOAL Act Evaluate WORLD Text: p. 390-392

  5. Evaluate Intention Act Evaluate Sequence of Actions Interpret Perceive Act! Let’s go further GOAL WORLD

  6. Evaluate Intention Sequence of Actions Interpret Perceive Act! Let’s go further Goal PERSON INTERFACE WORLD

  7. Evaluate Intention Act Evaluate Sequence of Actions Interpret Perceive Act! Turning on a light bulb (the Action Cycle) GOAL WORLD

  8. So what are the Gulfs • Execution: have an intention but can’t act • Evaluation: Can’t figure out whether the goal has been achieved

  9. Evaluate Gulf of execution! Gulf of evaluation! Interpret Perceive Gulfs GOAL Intention Sequence of Actions WORLD

  10. Questions • Why is intention left in the diagram?

  11. 7 Gulf Based Design Questions • 1. Do I know what it does? • 2. Do I know what actions I can take? • 3. Can I map each of my intentions to a movement? • 4. Can I make those actions easily? • 5. Do I know what state or mode its in? • 6. Can I interpret that state? • 7. Can I tell when my goal has been achieved?

  12. Back to light bulbs • Have you ever seen • A lamp that wasn’t obviously a light? • A lamp you didn’t know how to turn on or off or how many levels it had? • A lamp where you didn’t know how the switch worked? • The switch was hard to flip? • You couldn’t tell if it was on/off/or on and burned out?

  13. Other examples?

  14. When do you deliberately design a gulf of execution?

  15. When do you not want a gulf of execution?

  16. Mini Design Exercise • With a partner or small group, design a better voting system. • How will your system support the complete action cycle?

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