Isen, A.M., University of Maryland Baltimore County,  Daubman, K.A., University of Maryland (College Park), Nowicki, G.P., University of Maryland Baltimore County
Journal of Personality and Social Psychology
1987. Vol. 52. No. 6,'1122-1131

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Shigehiro Oishi,Department of Psychology, University of Virgini, Selin Kesebir,Darden School of Business, and Ed Diener, Department of Psychology, University of Illinois and Gallup, Washington, District of Columbia
Psychological Science
22(9) 1095–1100

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Carol D. Ryff and Corey Lee M. Keyes
University of Wisconsin—Madison
Journal of Personality and Social Psychology
1995, Vol. 69, No. 4,719-727

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Ed Diener, University of Illinois and the Gallup Organization, USA & Micaela Y. Chan University of Texas at Dallas, USA
APPLIED PSYCHOLOGY: HEALTH AND WELL-BEING, 2011, 3 (1), 1–43

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James K. Harter, The Gallup Organization, Frank L. Schmidt, University of Iowa & Theodore L. Hayes U.S. Immigration and Naturalization Service

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Julia K. Boehm and Sonja Lyubomirsky
University of California, Riverside
Journal of Career Assessment 2008; 16; 101

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Christie Napa Scollon, Texas Christian University & Ed Diener, University of Illinois at Urbana–Champaign and The Gallup OrganizationWashington, District of Columbia
Journal of Personality and Social Psychology
2006, Vol. 91, No. 6, 1152–1165

Link zur Studie (Intern)