A face is more than the sum of its parts

You stop at a shop window and wonder why someone inside is blatantly staring at you -- until you realize this person is you. Scenarios like this are impossible for us to imagine, but quite common for sufferers of acquired prosopagnosia (AP), a condition which can occur after brain damage, hindering the ability to recognize faces. In a new study published in the March 2010 issue of Elsevier's Cortex, researchers have found that the condition is linked to an inability to process faces as a whole, or holistically.

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