This study explores how researchers’ analytical choices affect the reliability of scientific findings. Most discussions of reliability problems in science focus on systematic biases. We broaden the lens to emphasize the idiosyncrasy of conscious and unconscious decisions that researchers make during data analysis. We coordinated 161 researchers in 73 research teams and observed their research decisions as they used the same data to independently test the same prominent social science hypothesis: that greater immigration reduces support for social policies among the public. In this typical case of social science research, research teams reported both widely diverging numerical findings and substantive conclusions despite identical start conditions. Researchers’ expertise, prior beliefs, and expectations barely predict the wide variation in research outcomes. More than 95% of the total variance in numerical results remains unexplained even after qualitative coding of all identifiable decisions in each team’s workflow. This reveals a universe of uncertainty that remains hidden when considering a single study in isolation. The idiosyncratic nature of how researchers’ results and conclusions varied is a previously underappreciated explanation for why many scientific hypotheses remain contested. These results call for greater epistemic humility and clarity in reporting scientific findings.
This paper examines the influences of candidate perceptions on Germany's spring 2016 Länder election results. It takes a comparative approach, using a modified Michigan model on the data collected simultaneously in three Länder (Baden-Württemberg, Rhineland-Palatinate, and Saxony-Anhalt). It explains why the Green party was successful in Baden-Württemberg but not in the other Länder, the impact of the major candidates, and what distinguishes the influences of the current prime ministers running for these elections. Whereas Winfried Kretschmann's (Green party, Baden-Württemberg) high impact on the election results was driven mainly by a warmth dimension (sympathy), Malu Dreyer (SPD, Rhineland-Palatinate) was viewed as being competent. Both candidates were assets to their parties and co-responsible for the results. In comparison, in Saxony-Anhalt, none of the candidates were as important to the outcomes of the electoral success.
In an era of mass migration, social scientists, populist parties and social movements raise concerns over the future of immigration-destination societies. What impacts does this have on policy and social solidarity? Comparative cross-national research, relying mostly on secondary data, has findings in different directions. There is a threat of selective model reporting and lack of replicability. The heterogeneity of countries obscures attempts to clearly define data-generating models. P-hacking and HARKing lurk among standard research practices in this area.This project employs crowdsourcing to address these issues. It draws on replication, deliberation, meta-analysis and harnessing the power of many minds at once. The Crowdsourced Replication Initiative carries two main goals, (a) to better investigate the linkage between immigration and social policy preferences across countries, and (b) to develop crowdsourcing as a social science method. The Executive Report provides short reviews of the area of social policy preferences and immigration, and the methods and impetus behind crowdsourcing plus a description of the entire project. Three main areas of findings will appear in three papers, that are registered as PAPs or in process.
The paper reports findings from a crowdsourced replication. Eighty-four replicator teams attempted to verify results reported in an original study by running the same models with the same data. The replication involved an experimental condition. A “transparent” group received the original study and code, and an “opaque” group received the same underlying study but with only a methods section and description of the regression coefficients without size or significance, and no code. The transparent group mostly verified the original study (95.5%), while the opaque group had less success (89.4%). Qualitative investigation of the replicators’ workflows reveals many causes of non-verification. Two categories of these causes are hypothesized, routine and non-routine. After correcting non-routine errors in the research process to ensure that the results reflect a level of quality that should be present in ‘real-world’ research, the rate of verification was 96.1% in the transparent group and 92.4% in the opaque group. Two conclusions follow: (1) Although high, the verification rate suggests that it would take a minimum of three replicators per study to achieve replication reliability of at least 95% confidence assuming ecological validity in this controlled setting, and (2) like any type of scientific research, replication is prone to errors that derive from routine and undeliberate actions in the research process. The latter suggests that idiosyncratic researcher variability might provide a key to understanding part of the “reliability crisis” in social and behavioral science and is a reminder of the importance of transparent and well documented workflows.
Wahlen-und Bundestagswahlen im Besonderen-sind das Ereignis, bei dem die Mehrzahl der Bürger ihre Einstellungen und Meinungen in tatsächliches politisches Verhalten umsetzt. Zugleich ist dies für die meisten auch die einzige aktive Teilnahme an der Politik. Es ist also nicht übertrieben, den Wahlakt als wichtigstes demokratisches Element (nicht nur) im deutschen politischen System zu bezeichnen. War das Wahlverhalten lange Zeit von Gruppenzugehörigkeit determiniert, so hat sich in den letzten Jahren in der Wahlforschung die Annahme verfestigt, dass immer mehr situative Komponenten, persönliche Vorlieben und Sympathien, beispielsweise die Kandidatenorientierung, bei der tatsächlichen Wahlentscheidung eine große Rolle spielen. Dazu soll hier das kleinste Flächenbundesland, das Saarland, betrachtet werden, wo im Vorfeld der letzten Landtagswahl eine stark auf die Rolle des Kandidaten Oskar Lafontaine fokussierte Medienberichterstattung stattfand, bei der immer wieder auf die tragende Rolle des Blumenberg / Kulick: Einfluss von Spitzenkandidaten auf das Wahlverhalten
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