A Boston police officer chasing a suspect ran past a brutal assault and was prosecuted for perjury when he claimed not to have seen it — so researchers ran their own test on such inattentional blindness:
We simulated the Boston incident by having subjects run after a confederate along a route near which three other confederates staged a fight. At night only 35% of subjects noticed the fight; during the day 56% noticed.
(Hat tip to Tyler Cowen.)
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