Scene stimuli and task procedure

Stimuli consisted of 40 digitized photographs of real-world scenes. The real-world scene stimuli included a variety of indoor and outdoor environments. Participants were instructed to memorize each scene in preparation for a later memory test that was not administered. Each trial began with a fixation on a cross at the center of the display for 300 msec. Following fixation, each scene was presented for 12 seconds while eye movements were recorded. Scenes were presented in the same order across all participants. After completing the scene memorization task, participants completed a series of clinical individual difference measures including pre-diagnostic screens for attention-deficit disorder, autism spectrum disorder, and dyslexia. Eye movements were not recorded for the clinical individual difference measures.