Measurement of cognition has been part of the core HRS survey since the beginning in 1992. Two separate supplemental studies provide in depth cognition measurement. Two researcher contributed datasets using the core data are also available.
These sources are listed below with relevant documentation. The cognition data in the core are available as a part of the public data. The HCAP and ADAMS data are available as sensitive data products, which requires an extra step to access.
Core interview data (1992-2016)
- Documentation of Cognitive Functioning Measures in the Health and Retirement Study. An overview and background on the available measures in the core interview, including SAS code for creating constructed variables.
- Health and Retirement Study Imputation of Cognitive Functioning Measures: 1992-2014. Information on the imputation of missing cognition data including a summary table of the number of imputed cases per measure per wave and a summary table of the variable names for core cognition questions by wave 1992-2014.
- New Measures of Fluid Intelligence in the HRS. Information on the cognition measures of numerical ability, qualitative reasoning, and verbal reasoning add to the core interview in 2010.
Harmonized Cognitive Assessment Protocol (HCAP)
HCAP is part of an ongoing international research collaboration funded by the National Institute on Aging to measure and understand dementia risk within ongoing longitudinal studies of aging around the world that have aimed to harmonize methods and content to facilitate cross-national comparisons.
- 2016 Harmonized Cognitive Assessment Protocol (HCAP) Protocol Summary. An overview and background on the study protocol and available measures.
Aging, Demographics, and Memory Study (ADAMS)
ADAMS is a supplemental study in the HRS that conducted in-person clinical assessments to gather information on their cognitive status. A diagnosis of dementia, cognitive impairment but not demented (CIND), or non-case was assigned on the basis of this assessment.
- Aging Demographics and Memory Study (ADAMS): Sample Design, Weighting and Analysis. An overview and background on the sampling and study design.
- Langa-Weir Classification of Cognitive Function. A researcher contributed dataset that provides a total summary score for cognition using measures from the core HRS interview as well as three derived categories: Normal, Cognitively Impaired but not Demented (CIND), and Demented, described in Crimmins et al. (2011)
- Dementia Predicted Probabilities Files. A researcher contributed dataset that provides predicted probabilities of dementia in respondents aged 70 and older in the HRS based on a methodology developed for the study of the monetary cost of dementia in Hurd et al. (2013)
A webinar took place in March 2018 that provides an overview of these data resources with information on how to get started using them.