Metadata discovery starts here.

CLASSIC is a public portal for discovering study metadata, harmonizing measures, and streamlining data access requests across research programs.

Programs

Studies

Instruments

Datasets

Variables

Questions

Browse Programs

Explore programs and their associated studies.

See published studies and their metadata summaries.

Browse topics, modalities, and measurement types.

Start a guided request workflow (coming soon).

Submit new metadata for review (coming soon).