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. 2020 Apr 10;43(10):zsaa076. doi: 10.1093/sleep/zsaa076

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Published by Oxford University Press on behalf of Sleep Research Society (SRS) 2020.

This work is written by (a) US Government employee(s) and is in the public domain in the US. This Open Access article contains public sector information licensed under the Open Government Licence v2.0(http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/).

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Figure 1. — Visual attention task (2-ball tracking). During TRACK epochs, participants tracked the target ball set, which was briefly highlighted (frame 2) after the instruction (frame 1), while all 10 balls randomly moved for 9.4 s (frame 3). Then, participants responded with a button press if the highlighted balls were the target set that they were tracking (frame 4). After a 1-s response window, the original target set was re-highlighted for 0.5 s to re-focus participants’ attention on the target balls and the balls began to move again.