“…Perseverative cognition, including worry or rumination, may lead to difficulties initiating sleep (i.e., longer sleep latency), maintaining an adequate amount of sleep (i.e., sleep duration), and obtaining enough restorative sleep (i.e., sleep quality) to feel refreshed and energized upon awakening (i.e., daytime sleepiness; cf. Brosschot, Gerin, & Thayer, 2006;Pieper, Brosschot, van der Leeden, & Thayer, 2010;Zoccola, Dickerson, & Lam, 2009). Similarly, perseverative cognition has also been found to contribute to sleep disorders, particularly in insomnia (Morin, Vallières, & Ivers, 2007).…”