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I think it happens for everyone that sometimes we go to a room and forget why we went there. Is there any research or article on this?

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It is a phenomenon known as room amnesia, some research has shown that your brain may use physical barriers like the room and doorways as a way to compartmentalize thoughts. One article summarizes it here:

The researchers say that when you pass through a doorway, your mind compartmentalizes your actions into separate episodes. Having moved into a new episode, the brain archives the previous one, making it less available for access. It’s as if you slam a mental door between what you knew and…what was I saying?

This is the research.

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Nice! I wonder if this works with transparent walls. Perhaps Japanese style semi-transparent paper walls? –  terdon Nov 30 '12 at 12:49
    
Try it! Go to your local garden centre, stand in a display greenhouse, think of something to go and buy, then walk out of the greenhouse and see if you remember! –  GriffinEvo Nov 30 '12 at 13:00
    
thank you very much! –  ahmadali shafiee Nov 30 '12 at 15:15
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