It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
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"