Chapter 13, 14 and 15

What is not a design implication of Fitt's Law?

• Checkbox buttons and labels should both be clickable

• Leave spaces between links to prevent people from clicking the wrong one

• Place important targets in the middle of the screen

• For smartphone apps, create buttons within thumb reach

Answer explanation

Important targets should be at the edge of the screen so they are easier to reach!

Fill in the two elements of the Steering Law:

Pointing time depends on ______________ of path.

(tip: the answer is ? and ?)

Choose the correct option according to the steering law

• a narrow path is slower to point through than a wide one

• a wide path is slower to point through than a narrow one

Answer explanation

A wider path is more spacious, allowing the user to be less exact and move faster.

Choose the best example of a good progress bar:

• 
• 

Which of the following were mentioned as

characteristics of a good progress bar?

• Indicating remaining time to conclusion

• Adding entertaining animations

• Including completeness percentage of process

• Using high contrast colors between concluded and remaining portions of the bar

What is the starting percentage a progress bar should show?

• 0%

• 1%

Answer explanation

Users worry if the bar stays at 0% for more than 1–2 seconds. Similarly, 100% should only be displayed very briefly at the end of an operation, so the user will not assume something is wrong.

Which of the following guidelines for slow loading images is recommended?

• Loading full resolution

  from top to bottom

• Loading low resolution first,

  loading full resolution later

Answer explanation

Loading low to high shows the full image very quickly, even if the high res takes a bit longer to kick in.

Which of the following guidelines for slow loading text pages is recommended?

• Loading full resolution from top to bottom

• Loading low resolution first,

  loading full resolution later

Answer explanation

Low resolution text annoys the user, so loading top to bottom I the best option.

An unintentional error due to forgetfulness is a...

• mistake

• slip

Answer explanation

Mistakes are intentional choices based on misinformation of misunderstandings.

Which of the following is not a type of slip?

• Description Slip

• Capture Slip

• Opening Slip

• Loss of Activation Slip