L10: Designing for Efficiency

Question 1

For ease of learning an interface must be…

Answer 1

Familiar, Memorability eg.) a trash icon, Consistency, and Supportive(do what users expect)

Question 2

For efficiency of use an interface must be…

Answer 2

Direct, responsive, Non-restrictive, Customizable(allowing users to tailor things)

Question 3

What makes it difficult to build solutions that are both easy to learn and efficient to use?

Answer 3

​Trying to build a solution that is both easy to learn and efficient to use can be difficult because in many cases we don’t have the resources, time or the money to cater to both audiences. In most cases we have to decide which to address, easy to learn or effective by understanding when it’s appropriate to choose one over the other.

Question 4

What is the trade-off to design an interface that can be both easy to learn and efficient to use?

Answer 4

A need for separate access to advanced features

Question 5

What is the difference between efficiency and effectiveness?

Answer 5

Efficiency is concerned primarily with how quickly a task can be completed, while effectiveness considers how well the work is done.

Question 6

What characteristic of two targets IS NOT a factor in Fitt’s Law?

a. Size of target
b. Colour of targets
c. Distance between targets

Answer 6

b. Colour of targets

Question 7

Fitt’s Law demonstrate that there is a relationship between the size of the targets, the distance between them, the speed of tapping, and …

Answer 7

The number of errors made

Question 8

T or F: According to Fitt’s law you should link a photo.

Answer 8

True

Question 9

Which of the following is NOT a shortcut goal?

a. Non-intrusive
b. Easy to undo
c. Engaging

Answer 9

c. Engaging

Question 10

What is a quick and direct shortcut?

Answer 10

Single or simple keystroke/click/gesture

Question 11

What is a non-intrusive shortcut?

Answer 11

Multi-mode input eg.) keystroke with one hand while using mouse with other

Question 12

What is a shortcut to avoid mistakes

Answer 12

Easy to undo especially important if single keystrokes are used for shortcuts

Question 13

What is the optimal size for visual chunking at a viewing distance of 500mm/20in?

Answer 13

50mm/2in ; easy for users to digest information on screen

Question 14

The most important factors in the model Tom Tulllis developed for predicting display search times are?

Answer 14

The number of groups on the display and the average size of the groups