> They arranged the former horizontally, with the young Brad Pitt to the left and the old Brad Pitt to the right. But the same people arranged the pictures of J

> They arranged the former horizontally, with the young Brad Pitt to the left and the old Brad Pitt to the right. But the same people arranged the pictures of Jet Li vertically, with young Jet Li appearing at the top and old Jet Li appearing at the bottom. It is actually surprising that researchers asked same group of people both questions. Shouldn't they had randomly separated their subjects into "Jet Li" and "Bradd Pitt" groups and asked each group only one question, so that subjects do not realize what is the purpose of the experiment?