“…In this line, the ISI has been translated and validated all around the world into several languages: Italian (Castronovo et al, 2016), Korean (Cho et al, 2014), Portuguese (Clemente et al, 2021), Hindi (Lahan & Gupta, 2011), Arabic (Suleiman & Yates, 2011), Chinese (Chung et al, 2011), and German (Dieck et al, 2018). It has also been validated in a variety of populations – not only those diagnosed with insomnia – differing in age: teenagers (11–19 years) (e.g., Brooks et al, 2019; Chahoud et al, 2017; Chung et al, 2011), young adults (16–27 years) (e.g., Wong et al, 2017; Veqar et al, 2017; Lin et al, 2018), and adults and elderly (17–88 years old) (e.g., Dieperink et al, 2020; Michaud et al, 2021; Sierra et al, 2008) and in the type of population: clinical – people with a medical condition (e.g., Castronovo et al, 2016; Cho et al, 2014; Kaufmann et al, 2019); community – people recruited from the general population, not from hospitals or clinics (e.g., Park & Lee, 2019); Chung et al, 2011; Albougami & Manzar, 2019), or both clinical and community (e.g., Yazdi et al, 2012; Yusufov et al, 2019).…”