In Boggle, it is the random letters that appear face up.

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They gave seven random letters to 154 participants and asked them to create as many words as they could within a minute, writing them on a workbook.

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They asked 121 psychology students who had volunteered for the experiment to watch a silent video of a woman being interviewed that had random words appearing in bold black letters every ten seconds along the perimeter of the video.

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The letters "FONTAINE" might be visible on the back of a jersey in a random highlight.

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