The document discusses the Child Behavior Checklist (CBCL), a caregiver-reported questionnaire used to assess competencies and behavioral/emotional problems in children ages 4-18. It was developed in 2001 by Thomas Achenbach and provides standardized ratings of internalizing problems, externalizing problems, and 8 behavioral syndrome scales. The CBCL takes 25-30 minutes for caregivers to complete and provides T-scores that can be interpreted based on age-related norms to identify normal, borderline, or clinical levels of functioning. It has demonstrated reliability and validity through extensive research.