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Chapter 7
we experienced that the eyes closed condition was more comfortable for children than eyes open. Although recent studies have shown similar RS networks across different RS conditions (Yan et al., 2009; Zou et al., 2015), differences in connectivity strength (Van Dijk et al., 2010; Yan et al., 2009) and test-retest reliability have also been reported (Patriat et al., 2013; Zou et al., 2015). Moreover, despite the specific instructions to participants to not to fall asleep, sleep was not directly monitored, which is a limitation of our RS design. Last, the behavioral genetic analyses had smaller sample sizes for moderate (Nmz=92, Ndz=67) and minimal head motion (Nmz=24, Ndz=20) than the analyses on the full sample (Nmz=129, Ndz=108). As the statistical power of genetic studies is influenced by the sample size (Verhulst, 2017), differences in results could be influenced by differences in sample sizes.
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