Cross-Cultural Adaptation and Validation of the Simplified Chinese Version of the Communication and Symbolic Behavior Scales Developmental Profile Infant–Toddler Checklist

PURPOSE: This study aimed to adapt and validate the Communication and Symbolic Behavior Scales Developmental Profile Infant-Toddler Checklist (CSBS-DP-ITC) for infants aged 6-24 months in mainland China (Simplified Chinese version), ensuring its effectiveness in identifying communication delays and neurodevelopmental risks. METHOD: = 130). Validity was evaluated using exploratory/confirmatory factor analysis (EFA/CFA), convergent/discriminant validity, and criterion validity against the Gesell Developmental Schedules (GDS)-Chinese version and known-groups validity. RESULTS: < .001). Notable ceiling effects (emotion/eye gaze, communication) and floor effects (words) were observed. CONCLUSIONS: The Simplified Chinese CSBS-DP-ITC exhibited robust reliability and acceptable validity for screening early communication skills among mainland Chinese infants. Generalizability may be constrained by urban, highly educated samples, and future studies should include rural populations. SUPPLEMENTAL MATERIAL: https://doi.org/10.23641/asha.32048631.