Search Results Use the search box below to revise your search, or start a new search. Studies (2) Variables Publications Your query returned 2 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. National Survey of Midlife Development in the United States (MIDUS II): Cognitive Project, 2004-2006 (ICPSR 25281) Ryff, Carol D.; Lachman, Margie E. 2. Midlife Development in the United States (MIDUS): Survey of Minority Groups [Chicago and New York City], 1995-1996 (ICPSR 2856) Hughes, Diane L.; Shweder, Richard A.