“…Items (e.g., "I do not show my emotions to others") are rated on a 4-point Likert scale from 0 (not at all true) to 3 (definitely true). The construct validity of the ICU was supported in a large community sample (n = 1,443) of 13-to 18-year-old nonreferred German adolescents (774 boys and 669 girls; Essau, Sasagawa, & Frick, 2006), as well as an American sample (n = 248) of male and female juvenile offenders (188 boys, 60 girls) between the ages of 12 and 20 (Kimonis, Frick, Skeem, et al, 2008; see also Fanti, Frick, & Georgiou, 2009). …”