The ddialliance.org website will be unavailable from 11pm (U.S. Eastern Time) on Saturday August 24th until 7am on August 25th due to server maintenance.

Vietnam Era Twins Study of Aging (VETSA)

DDI Versions Used: 

The VETSA is a nationwide longitudinal project designed to examine genetic and environmental influences on late midlife cognitive and brain changes. Starting in 2002, the baseline VETSA assessment conducted in-person testing of a community-dwelling sample of 1237 male twins ages 51-60 including a five- year follow-up completed in 2013. The project is unique in its inclusion of an in depth cognitive battery, magnetic resonance imaging data, neuroendocrine data, biomedical, biomarker, and psychosocial measures in the same middle-aged adults in the context of a behavior genetic study.

VETSA is applying DDI-Lifecycle to document project-connected materials (e.g., procedures, codebooks, scoring systems, measures, variable definitions, statistical syntax, and datasets) and to facilitate interactive use by other researchers.