Developmental trajectories of challenging behaviors reported retrospectively by Japanese parents of adult children with intellectual disabilities.

Individuals with intellectual disabilities (ID) are at heightened risk of behavioral problems. This study investigated differences in the severity of challenging behaviors (CBs) among individuals with IDs at varying life stages. Data were collected from parents' retrospective interviews.

Reliability and validity of the Japanese version of the Behavior Problem Inventory-Short Form.

Background: The Behavior Problems Inventory-Short Form (BPI-S), which assesses behavior problems in individuals with intellectual disabilities (ID), is a shorter version of the BPI-01. This study investigated the reliability and validity of the BPI-S Japanese version (BPI-S-J) for adolescents/adults with ID and behavior problems.

Methods: The test-retest reliability included participants with ID and behavioral problems who were enrolled in welfare services.