Fig. 2.

Panel 2A illustrates the perceptual discrimination (knot-matching) task used during behavioural training (left portion of the figure), as well as the scrambled knot images that were used in addition to the knot photographs to establish baseline visual activation during the fMRI portion of the experiment. For the perceptual discrimination task, participants’ objective was to respond as quickly and accurately as possible whether the two photographs were of the same or different knots. Panel 2B illustrates participants’ performance on the perceptual discrimination task across the five days of behavioural training. Panel 2C illustrates participants’ mean accuracy across the five days of behavioural training. Error bars represent standard error of the mean.