Perceptual recognition of the stimuli. The box plot shows the median (horizontal line at the center of each box), two central quartiles (25%) above and below the median in the shape of a box, and the first and last quartile (22.5%) graphed as extension lines (“whiskers”). The dots are observations outside the 95% confidence interval. Asterisks at the top of each column denote the confidence of the result, with a single asterisk indicating 5% error (), a double asterisk indicating 1% error (), a triple asterisk indicating 0.1% error (), and the abbreviation n.s. indicating “not significant.”
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