Human Error

• Human error is the responsibility of design.
  • #responsibility of bad UI
  • The fifth chapter contains a lot of methods to avoid it using Constraints.

There are two types of errors:

• Slips: When what you intended to do and what you actually did are different (careless mistakes). This is common among experienced people.

  • Capture errors
    • It’s like doing something without realizing that it has changed.
    • For example, when there are ABCDE and ABDCE, if A and B are the same, you might end up doing the one that you didn’t originally intend to do.
    • Designers should ensure that similar actions do not start in the same way.
  • Similarity of descriptions
    • Mistaking two similar things.
    • Designers should make sure that things with different purposes do not look similar.
  • Memory lapse
    • Basically forgetting#memory
    • Skipping a step while doing something.
    • Countermeasure: Avoid interruptions from other tasks during work.
  • Mode error
    • When screens for State A and State B look similar, an error occurs where you thought you were in State A but you were actually in State B.
    • This happens when trying to achieve different purposes with the same control unit.
      • If it’s a different state, the screen should show a change.

• Mistake

  • When what you intended to do in the first place is different. This is common among beginners.

• Social pressure can also be a cause.#conformity pressure, etc.

  • Although it doesn’t seem like a design-related issue, it should be taken into consideration.
  • Not reporting a mistake, for example.
    • This can be resolved by providing rewards that outweigh the pressure. (For more details, refer to the book, around p260)

#design for whom?