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Human Computer Interaction > Lecture 7: Errors > Flashcards

Lecture 7: Errors Flashcards

1
Q

What are the four error types?

A
  1. Slips
  2. Lapses
  3. Mistakes
  4. Mode
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2
Q

What are Slip errors?

A

Slips are errors with regards to a failure of execution.

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3
Q

What are Lapse errors?

A

Lapses are errors with regards to a failure of memory.

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4
Q

What are Mistakes?

A

Mistakes are errors with regards to using a wrong procedure to try achieve a certain goal.

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5
Q

What are two types of Slip errors?

A
  1. Capture

2. Description

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6
Q

What is the Capture slip error?

A

A capture slip error is when you start executing one sequence of actions, but drift into another, usually more familiar sequence.

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7
Q

What is the Description slip error?

A

A description slip error is when two actions are very similar, the users accidentally substitutes one for another.

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8
Q

What are the three types of lapse errors?

A
  1. Loss of intention
  2. Omissions due to interruption
  3. Omissions due to already-satisfied goal
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9
Q

What are Modes?

A

Modes are states in which actions have different meanings e.g. CAPS LOCK.

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10
Q

What are Mode errors?

A

Mode errors are generally slips (errors) in the execution of a learned procedure, caused by failing to correctly evaluate the state of the interface.

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11
Q

What are the two steps that can be taken to avoid capture and description slips?

A
  1. Avoid actions with very similar descriptions, the opposite of the consistency heuristics - different things should look and act differently.
  2. Keep dangerous commands away from common ones
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12
Q

What are the three steps that can be taken to avoid mode errors?

A
  1. Eliminate modes
  2. Increase visibility of mode
  3. Spring-loaded or temporary modes
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13
Q

What are the three steps that can be taken to avoid lapses?

A
  1. Keep procedures short
  2. Minimise interruptions
  3. Using forcing functions
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14
Q

What are the four general steps which can be taken for error prevention?

A
  1. Disable illegal commands
  2. Use menus and forms, no command languages
  3. All needed information should be visible
  4. Use combo boxes, not text boxes
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15
Q

What are the two key points around confirmation dialogues?

A
  • Frequent commands should avoid confirmations.

- Operations that are very hard to reverse may deserve confirmation.

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16
Q

When writing error messages what are the FIVE key aspects?

A
  1. Be precise
  2. Restate user’s input
  3. Speak the user’s language
  4. Suggest Reasons and Solutions (constructive help)
  5. Be polite (avoid loaded words and non-blaming)
17
Q

What are the four simplifying data entry design patterns?

A
  1. Autocomplete
  2. Forgiving Format
  3. Input Hints
  4. Event Calendar

Human Computer Interaction (14 decks)

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