Study Search Results Your query returned 2 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance (?) Study Title/Investigator 1. Cognition and Aging in the USA (CogUSA) 2007-2009 (ICPSR 36053) McArdle, John; Rodgers, Willard; Willis, Robert 2. National Survey of Midlife Development in the United States (MIDUS I) National Study of Daily Experiences (NSDE), 1996-1997 (ICPSR 3725) Almeida, David M.