Figure 2.

Procedure and stimuli. (a) Trial structure in the Regularity Discrimination Task. Each trial began with a 1.5 s baseline, followed by a 1.5‐s pattern presentation. The pattern could be symmetry (25% of trials), anti‐symmetry (25%), or random (50%). The patterns were always black and white. Finally, after the pattern disappeared, participants entered their binary judgment in a non‐speeded way. The task was to enter the correct judgment (‘Symmetry’ for either symmetry or anti‐symmetry, or ‘Random’ for random). (b) Trial structure in the Colored Oddball Task. Again, each trial began with a 1.5‐s baseline, then a 1.5‐s pattern presentation, and then the participants entered their binary judgment in a non‐speeded way. The patterns could be black and white (83.3% of trials) or infrequent yellow and blue colored oddballs (16.7%). The participants’ task was to enter the correct judgment (‘No Color’ for the frequent black and white patterns, or ‘Color’ for the infrequent Colored oddballs). (c) Example stimuli from both tasks. In the Regularity Discrimination Task, all stimuli were black and white (upper row). In the Colored Oddball Task, there were additional colored oddball trials presented (lower row). It is important to note that these patterns shown in this figure are just examples; in the experiment, each trial involved a novel pattern [Colour figure can be viewed at http://wileyonlinelibrary.com]