Sophie Hsin-Yi Liang,1 Jen-Yu Chou,2 Yu-Yu Wu,3 Chin-Pang Lee,4 Brent Allan Kelsen,5 Yi-Chen Lee6 1Section of Department of Child and Adolescent Psychiatry, Department of Psychiatry, Chang Gung Memorial Hospital at Taoyuan and Chang Gung University College of Medicine, Taoyuan, Taiwan; 2Graduate Institute of Humanities in Medicine, Taipei Medical University, Taipei, Taiwan; 3Section of Department of Child and Adolescent Psychiatry, Department of Psychiatry, Chang-Gung Memorial Hospital at

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... and Chang Gung University College of Medicine, Taiwan, YuNing Psychiatric Clinic, Taipei, Taiwan; 4Department of Psychiatry, Chang-Gung Memorial Hospital at Linkou and Chang Gung University College of Medicine, Taoyuan, Taiwan; 5Language Center, National Taipei University, New Taipei City, Taiwan, Department of Psychology, Auckland University of Technology, Auckland, New Zealand; 6Department of Psychiatry, Chang-Gung Memorial Hospital at Chiayi and Chang Gung University College of Medicine, Chiayi, TaiwanCorrespondence: Yi-Chen LeeSchool of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, TaiwanEmail peggylee599@gmail.comBackground: The Devereux Early Childhood Assessment for Toddlers (DECA-T), which is one of the few standardized, norm-referenced behavioral rating scales related to young children's mental health, resilience, and social-emotional development, was developed for toddlers aged between 18 and 36 months.Objective: The aim of this study was to test the clinimetric properties of the Chinese (Traditional) version of the DECA-T (C-DECA-T) using a classical test theory analysis and an item response theory analysis.Methods: Seventy-five community-based toddlers aged from 18 to 36 months and 50 clinic-based participants recruited in hospitals in northern Taiwan participated in this study. Social-emotional competence was assessed by the C-DECA-T and children's behavior problems were rated via the Child Behavior Checklist 1.5 to 5 (CBCL/1.5–5). Homogeneity of the C-DECA-T was assessed by M [...]