“…There is abundant evidence that sleep problems can account for or conversely can be explained by various emotional disturbances, including anxiety (e.g., Fite, Becker, Rubens, & Cheatham-Johnson, 2015;Iwadare et al, 2015;Leblanc, Desjardins, & Desgagné, 2015;Weiner, Meredith Elkins, Pincus, & Comer, 2015), depression (e.g., Shittu et al, 2014;Sivertsen, Harvey, Lundervold, & Hysing, 2014;Zuo, McCabe, Mellor, & Xu, 2015), and anger or aggression (e.g., Fite et al, 2015;Ireland & Culpin, 2006;Vaughn, Salas-Wright, White, & Kremer, 2015). The presence of insomnia or hypersomnia is indeed a diagnostic criterion for mood disorders, including both major depression and bipolar disorders (American Psychiatric Association, 2013).…”