Engineering does not replace art in a design, it makes it possible.

Place information and controls in consistent locations.

There is a third method of using science to help engineer a system that goes beyond design rules—design models

step up in structure from segmented data fields are data-specific controls.

has fewer sides and more symmetry than the other two interpretations.

Children are more stimulus driven: their perception is less filtered by their goals. This characterisitic makes them more distractible than adults, but it also makes them less biased as observers.

The Common Fate principle states that objects that move together are perceived as grouped or related.

Specifically, our goals filter our perceptions: things unrelated to our

Continuity, Closure, Symmetry, Figure/Ground, and Common Fate.