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the subjects viewed the same second set of images while being scanned by the fMRI. Then, the researchers attempt to match the images to see which pair is most similar.

Their attempt to decipher the brain was correct 92 percent of the time for Naselaris (110 images out of 120) and 72 percent of the time for Kay (86 out of 120).

Mathematically, the scientists should have been able to “blind-guess” the correct answer in only 8 out of 1,000 tries, or 0.8 percent of the time.