Things that move can kill you, so human vision is very sensitive to movement.

1. Notice that you can detect the blinking arrow while looking anywhere on the screen,
2. And, you can detect the color well before the shape of the blinking symbol*.
3. Not only are human's sensitive to blink or motion in the periphery, we automatically look at it. That is why banner ads on web pages can be so annoying.

Our usability courses teach how to effectively use features like color* and blink.

 * 1 in 12 North American males have "color blindness"—red and green cause the most problem.

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