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We computed pairwise group differences for key graph metrics, including small-worldness and modularity. We found that older adults tested in the morning and young adults did not differ on any graph metric. Both of these groups differed from older adults tested in the afternoon during the tasks\u2014but not rest. Specifically, the latter group had lower modularity and small-worldness (indices of more efficient network organization). Across all groups, higher modularity and small-worldness strongly correlated with reduced distractibility on an implicit priming task. Increasingly, TOD is seen as important for interpreting and reproducing neuroimaging results. Our study emphasizes how TOD affects brain network organization and executive control in older adults.<\/jats:p>","DOI":"10.1162\/jocn_a_01060","type":"journal-article","created":{"date-parts":[[2016,10,19]],"date-time":"2016-10-19T18:27:17Z","timestamp":1476901637000},"page":"560-572","update-policy":"http:\/\/dx.doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":11,"title":["Task-linked Diurnal Brain Network Reorganization in Older Adults: A Graph Theoretical Approach"],"prefix":"10.1162","volume":"29","author":[{"given":"John A. 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