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A: Example category items for a participant, two examples from each category (A on left, B on right). B: Example training trial in which a different participant (hence, different random allocation of icons to categories) correctly responds “A” and positive feedback appears. C: Generalization gradients for each group. Error bars are 95% CI, adjusted for between-subject variance (Baguley, 2012). Labels on the abscissa are as per Figure 1.
