Study Search Results Your query returned 3 results. Series results are grouped under the most relevant study. You can ungroup series results. Use the search box below to revise your search, or start a new search. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded (?) Study Title/Investigator 1. Center for Research on Social Reality [Spain] Survey, May 1995: Old Age (ICPSR 6969) Centro de Investigaciones Sobre la Realidad Social (CIRES) 2. Midlife Development in the United States (MIDUS II): Milwaukee African American Sample, 2005-2006 (ICPSR 22840) Ryff, Carol; Almeida, David; Ayanian, John S.; et al. 5 more results in Midlife Development in the United States (MIDUS) Series 3. Quality of American Life, 1971 (ICPSR 3508) Campbell, Angus; Converse, Philip E.; Rodgers, Willard L.