The Chinese version of the Conners' Teacher Rating Scale-Revised: Short Form (CTRS-R:S) A 28-item teacher-reported rating scale for the assessment of behavioral symptoms, with four subscales: Oppositional (5 items), Cognitive Problems/Inattention (5 items), Hyperactivity/Impulsivity (7 items), and ADHD-index (12 items), was used. Like the CPRS-R:S, each item is rated from 0 for not true at all (never, seldom) to 3 for very much true (very often, very frequent) (Gau et al., 2006).