“…In the presentation article, the SHI-13 showed acceptable internal consistency, Cronbach’s alpha of .66, high test-retest stability, r of .71 (p<.01), and acceptable nomological validity, with a modest high correlation with the Epworth Sleepiness Scale (ESS), r of .24 (p<.01) and adequate correlation with the Pittsburgh Sleep Quality Index, r of .48 (Mastin et al, 2006). These characteristics have been corroborated in other studies with the participation of university students, particularly internal consistency values, Cronbach’s alpha, or McDonald’s omega, less than .70 (Ali et al, 2021; Kaur & Singh, 2017; Seun-Fadipe et al, 2018; Tang et al, 2021). Generally, internal consistency values greater than .70 are recommended (Campo-Arias & Oviedo, 2008; Kezsei et al, 2010).…”