Susan Weinschenk

if you are paying attention to one thing, and you don’t expect changes to appear, then you can easily miss changes that do occur.

The rule of thumb is that wherever you use color to give specific meaning, you need a redundant coding scheme, for example, color and line thickness, so that people who are color-blind will be able to decipher the code without needing to see specific colors.

New information is assimilated more thoroughly when it is plugged into existing cognitive structures.