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Do not skim. Do not skim. Do not skim. http://quizstop.com/askread.htm Your score will be affected if you do poorly on the Comprehension Test following the quiz.

The trick is to see this lady spinning in each direction: clockwise or counterclockwise. Most will see it orienting in one direction only. It's difficult to switch it in our minds. For many the task will be impossible. http://mindbluff.com/clockwise.htm