"[O]bject recognition is achieved by performing coordinate transformations that compensate for spatial transformations," they conclude. It's easier for us to see and recognize familiar objects which are presented at their known orientation. When these objects are presented at an unexpected angle, it becomes more difficult to process them.
The findings are presented in the article, "Orientation Congruency Effects for Familiar Objects," in the March 2005 issue of Psychological Science , a journal of the American Psychological Society.
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