Lecture 6

Question 1

Cognitive aspects of multiview cost-benefit tradeoffs

Answer 1

Cognitive aspects ◦ The time and effort to learn the system ◦ The load on the user’s working memory ◦ The effort required for comparison ◦ The effort required for context switching

Question 2

What stands out in perception?

Answer 2

Color

Orientation

Motion

Size

Shape

Number

Enclosure

Addition

Parallelism

Shading

Depth of field

Question 3

Three clutter reduction techniques

Answer 3

1. Appearance
   
   1. sampling
   2. filtering
   3. change point size
   4. change opacity
   5. clustering
2. Spatial distortion
   
   1. point-line displacement
   2. topological distortion
   3. space filling
   4. dimensional reordering
3. Temporal
   
   1. animation

Question 4

Scented widgets

Answer 4

Definition; enhanced user interface widgets with embedded visualizations that provide information scent cues for navigating information spaces.