DOI: 10.3886/icpsr37095.v1
title: Midlife in the United States (MIDUS 3): Cognitive Project, 2013-2017
title: Version 1

description: These data are being released in BETA version to facilitate early access to the study for research purposes. This collection has not been fully processed by NACDA or ICPSR at this time; the original materials provided by the principal investigator were minimally processed and converted to other file types for ease of use. As the study is further processed and given enhanced features by ICPSR, users will be able to access the updated versions of the study. Please report any data errors or problems to user support and we will work with you to resolve any data related issues.
Data in this collection are related to MIDUS 3 [ICPSR 36346]. Data collection for the MIDUS 3 largely repeated baseline assessments (e.g., phone interview and extensive self-administered questionnaire), with additional questions in selected areas (e.g., economic recession experiences, optimism and coping, stressful life events, and caregiving).
In 2013-2014, a second wave of cognitive assessments (Project 3) were carried out on individuals who had recently completed the MIDUS 3 phone survey (Project 1). This assessment, known as the Brief Test of Adult Cognition via Telephone (BTACT), was carried out approximately 9 years after the first wave of cognitive data collection was completed in 2004-2005. MIDUS 3 BTACT data were collected from 2,693 MIDUS 3 participants. Further, a second wave of cognitive assessments were also carried out on respondents to the MIDUS Milwaukee Wave 2 survey that was conducted in 2016-2017. BTACT data were collected from 330 Milwaukee respondents. Finally, BTACT data was collected in 2017 from another 268 respondents (called the Refielding sample) who did not complete this project during the M3 field period. This M3 BTACT dataset contains a total of 3,291 respondents. More details on the fielding of these cases can be found in the MIDUS field reports for the M3 survey [ICPSR 36346] and the Milwaukee 2 survey  [ICPSR 37120].
The dataset includes 245 variables and 3,291 cases. Demographic variables in this collection include sex and age.
description: The overarching objective of the MIDUS series is to investigate linkages between sociodemographic, psychosocial, and biological variables to account for later life profiles of morbidity and mortality.
The purpose of the Cognitive Project was to determine how cognition is related to overall mental and physical health. Specific goals were:   (1) to characterize the nature and range of midlife cognitive performance, relative to those younger and older, across multiple domains in a nationally representative sample (MIDUS);;   (2) to examine the relationship between biopsychosocial factors (e.g. SES, health status, health-promoting behaviors, metabolic and cardiovascular biomarkers, depression, personality, control beliefs, stressful life events) and individual differences in cognitive functioning. ; 
The development of a cognitive battery provided an opportunity to examine the cognitive performance of young, middle-aged, and older adults from a wide range of education levels in a large-scale, national sample.
description: The Brief Test of Adult Cognition via Telephone (BTACT) is the first comprehensive cognitive battery, including measures of speed and reaction time, to be administered by telephone to a national sample across the adult years and into later life. It includes seven subtests: word list recall immediate, word list recall delayed, backward digit span, number series, counting backward speed task, category fluency, and an attention switching reaction time task.
 Given the nature of the MIDUS sample, the cognitive project provides a rich data set to examine individual differences in cognitive functioning and changes therein over 9 years with a diverse sample in terms of age, sex, socioeconomic status (income, education) and geographical region. For more information on the BTACT instrument, please visit the Lifespan Lab Website and the publication by Lachman, Margie E. et al.
description: The dataset includes 245 variables and 3,291 cases. Demographic variables in this collection include sex and age.
description: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of
					disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major
					statistical software formats as well as standard codebooks to accompany the data. In addition to
					these procedures, ICPSR performed the following processing steps for this data collection:
					Checked for undocumented or out-of-range codes..
description: Presence of Common Scales:
					Brief Test of Adult Cognition via Telephone (BTACT); 
Stop and Go Switch Task (SGST);
description: Response Rates:
					Of the 3,290 eligible respondents who completed the MIDUS 3 Phone Survey Project, 2,956 completed the MIDUS 3 Cognitive Project for a response rate of 90 percent.
Among the 389 eligible respondents who completed the MIDUS Milwaukee 2 Survey Project, 330 completed the MIDUS 3 Cognitive Project for a response rate of 85 percent.
description: Datasets:
					
						DS1: Dataset
description: Midlife in the United States (MIDUS) Series
description: computer-assisted telephone interview (CATI)
description: cognitive assessment test
description: Non-institutionalized English-speaking adults in the United States who participated in the MIDUS 3 Survey Project [ICPSR 36346] or in the MIDUS Milwaukee Wave 2 Survey [ICPSR 22840].
description: MIDUS longitudinal respondents who completed the MIDUS 3 Phone Survey Project were eligible to participate in the MIDUS 3 Cognitive Project.
MIDUS Milwaukee longitudinal respondents who completed the Milwaukee Wave 2 CAPI interview were eligible to participate in the MIDUS 3 Cognitive Project.