Comparing Health Survey Data Cost and Quality Between Amazon’s Mechanical Turk and Ipsos’ KnowledgePanel: Observational Study

Patricia M Herman   ¹ , ND, PhD ;   Mary E Slaughter   ¹ , PhD ;   Nabeel Qureshi   ¹ , MPH, MPhil ;   Tarek Azzam   ² , PhD ;   David Cella   ³ , PhD ;   Ian D Coulter   ¹ , PhD ;   Graham DiGuiseppi   ⁴ , PhD ;   Maria Orlando Edelen   ^{5, 6} , PhD ;   Arie Kapteyn   ⁷ , PhD ;   Anthony Rodriguez   ⁶ , PhD ;   Max Rubinstein   ⁴ , PhD ;   Ron D Hays   ⁸ , PhD

¹ RAND, Santa Monica, CA, United States

² Department of Education, University of California Santa Barbara, Santa Barbara, CA, United States

³ Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, United States

⁴ RAND, Pittsburgh, PA, United States

⁵ Brigham and Women’s Hospital, Boston, MA, United States

⁶ RAND, Boston, MA, United States

⁷ Center for Economic and Social Research, Dana and David Dornsife School of Letters, Arts and Sciences, University of Southern California, Los Angeles, CA, United States

⁸ Division of General Internal Medicine and Health Services Research, Department of Medicine, University of California Los Angeles, Los Angeles, CA, United States