What is the role of collateral information in assessment?

• A. Information gathered solely from the youth.
• B. Information from parents, teachers, and others to provide a multi-context view.
• C. Only medical records.
• D. Only standardized test results.

Answer: (B)

Collateral information means gathering observations from people who know the youth well in different settings to build a fuller picture of how they function across contexts. Children and adolescents behave differently at home, in school, with peers, or in the community, so relying on a single source can miss important patterns or introduce bias. Information from parents, teachers, coaches, and others provides a multi-context view that helps clinicians understand strengths and challenges across environments, informs differential diagnosis, and guides treatment planning and supports at school. Without this broader perspective, a clinician might overfocus on what’s seen in one setting or reported by one informant.

Information solely from the youth lacks external corroboration and may miss context; medical records provide health history but not daily functioning or behavior across settings; standardized test results measure specific abilities but don’t capture how those abilities play out in real life.