The impact of sleep quality on visual working memory varied with the duration of maintenance.

For the 1 s delay condition, a marginally significant difference was evident between the high sleep quality group and the low sleep quality group ( p = 0.07).

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Similarly, within the last 30% of the trials, a significant difference was apparent between the offset of the high sleep quality group (M ± SD = 30.72 ± 7.78) and the low sleep quality group (M ± SD = 39.32 ± 10.90), ( t = 3.52, Cohen’s d = 0.91, p < 0.001). 4.

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