Studying psychopathy in early childhood is crucial for understanding its developmental pathways, identifying risk factors, and implementing early intervention. However, assessment measures for this age group remain limited. To address this gap, this study developed and validated the Parent-Report Youth Psychopathic Traits Inventory-Short Version (PR-YPI-S) by adapting YPI-S self-report items for parental reports of psychopathic traits in early childhood. 304 parents of children aged 3 to 6 years…
