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Proportion-correct of identifying crowded letters is plotted as a function of training block for an observer in Chung31 in panel (a). Each symbol represents the averaged performance for a block of 100 trials. His reading speeds (wpm) for different print sizes (deg), determined before (pre-test) and after (post-test) training, are plotted in panel (b). The presentation of these data is modified from Chung.31
