Parent–child discrepancies in screening for Internet Gaming Disorder: Evidence from a clinical sample of Japanese adolescents

Although parent and child IGDS scores demonstrate meaningful dimensional concordance, the application of fixed cutoff-based screening classifications substantially reduces agreement, a pattern that may reflect differences in evaluative thresholds between informants. These findings highlight limitations of relying solely on self-reported cutoff-based measures and underscore the need for multi-informant, dimensional approaches when interpreting IGD screening results in youth.