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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: J Exp Psychol Hum Percept Perform. 2013 Dec 23;40(3):1022–1033. doi: 10.1037/a0035377

Figure 1. Behavioral Task.

Figure 1

Trials began with a fixation array (upper panel) 500 ms. The small white dots to the left and right of fixation denoted where a target could appear. The target array (middle panels) was then presented for 75 ms. Observers were instructed to discriminate the orientation of the clock-face appearing over the placeholder. On 50% of trials, only the target was presented (“uncrowded” trials, not shown). On the remaining 50% of trials the target was flanked by two distractors. When present, these distractors were rotated ±60, 90, or 120°. At the end of each trial a randomly oriented probe was rendered at the same location as the target (bottom panel); observers adjusted the orientation of this stimulus until it matched their percept of the target's orientation.