Many analysts, one data set: making transparent how variations in analytic choices affect results

Silberzahn, R, Uhlmann, E L, Martin, D P, Anselmi, P, Aust, F, Awtrey, E, Bahník, Š, Bai, F, Bannard, C, Bonnier, E, Carlsson, R, Cheung, F, Christensen, G, Clay, R., Craig, M A, Rosa, A D, Dam, L, Evans, M H, Cervantes, I Flores, Fong, N, Gamez-Djokic, M, Glenz, A, Gordon-McKeon, S, Heaton, T J HEaton, Hederos, K, Heene, M, Mohr, A J Hofelich, Högden, F, Hui, K, Johannesson, M, Kalodimos, J, Kaszubowski, E, Kennedy, D M, Lei, R, Lindsay, T A, Liverani, S, Madan, C R, Molden, D, Molleman, E, Morey, R D, Mulder, L B, Nijstad, B.R, Pope, N G, Pope, B, Prenoveau, J M, Rink, F, Robusto, E, Roderique, H, Sandberg, A, Schlüter, E, Schönbrodt, F D, Sherman, M F, Sommer, S A, Sotak, K, Spain, S, Spörlein, C, Stafford, T, Stefanutti, L, Tauber, S, Ullrich, J, Vianello, M, Wagenmakers, E-J, Witkowiak, M, Yoon, S and Nosek, B A (2018) Many analysts, one data set: making transparent how variations in analytic choices affect results. Advances in Methods and Practices in Psychological Science, 1 (3). pp. 337-355. ISSN 2515-2459

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Abstract

Twenty-nine teams involving 61 analysts used the same data set to address the same research question: whether soccer referees are more likely to give red cards to dark-skin-toned players than to light-skin-toned players. Analytic approaches varied widely across the teams, and the estimated effect sizes ranged from 0.89 to 2.93 (Mdn = 1.31) in odds-ratio units. Twenty teams (69%) found a statistically significant positive effect, and 9 teams (31%) did not observe a significant relationship. Overall, the 29 different analyses used 21 unique combinations of covariates. Neither analysts’ prior beliefs about the effect of interest nor their level of expertise readily explained the variation in the outcomes of the analyses. Peer ratings of the quality of the analyses also did not account for the variability. These findings suggest that significant variation in the results of analyses of complex data may be difficult to avoid, even by experts with honest intentions. Crowdsourcing data analysis, a strategy in which numerous research teams are recruited to simultaneously investigate the same research question, makes transparent how defensible, yet subjective, analytic choices influence research results.

Item Type: Article
Schools and Departments: School of Business, Management and Economics > Business and Management
Subjects: H Social Sciences
H Social Sciences > HA Statistics
H Social Sciences > HA Statistics > HA029 Theory and method of social science statistics
Depositing User: Raphael Silberzahn
Date Deposited: 28 Aug 2018 09:06
Last Modified: 02 Jul 2019 14:00
URI: http://sro.sussex.ac.uk/id/eprint/78296

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