Change Blindness: Via Schneier on Security.

Interesting video demonstrating change blindness: the human brain's tendency to ignore major visual changes. The implications for security are pretty serious.

Read Original Article:(Via Schneier on Security.)

From the video page:

A special case of information-selection by the human cognitive system. The brain seems to select the information worth to process, or most relevant, at every instant, in almost every context. This might produce some very specific phenomena such as what psychologists call "Change Blindness".