HIGHLIGHTS
SUMMARY
Next, the authors sorted the pixel luminance of the 5 faces and the average face in ascending order, then swapped pixels from the 5 faces with those of the average face in ascending order, resulting in all five faces having exactly the same pixel values and distribution, but in different locations in each face, and thus removing any luminance or contrast differences between faces. Specifically, although face and form perception begin during infancy, peak performance on object and form perception tasks, such as the glass pattern task, occurs at approximately 9 years of age . . .
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