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Magnus Johannesson
Stockholm School of Economics
357Publications
84H-index
23kCitations
Publications 366
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#1Amanda Kvarven (University of Bergen)
#2Eirik Strømland (University of Bergen)H-Index: 2
Last.Magnus Johannesson (HHS: Stockholm School of Economics)H-Index: 84
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Many researchers rely on meta-analysis to summarize research evidence. However, there is a concern that publication bias and selective reporting may lead to biased meta-analytic effect sizes. We compare the results of meta-analyses to large-scale preregistered replications in psychology carried out at multiple laboratories. The multiple-laboratory replications provide precisely estimated effect sizes that do not suffer from publication bias or selective reporting. We searched the literature and ...
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#1Robin G Walters (University of Oxford)H-Index: 3
#2David W. Clark (Edin.: University of Edinburgh)H-Index: 6
Last.James F. Wilson (Edin.: University of Edinburgh)H-Index: 107
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In many species, the offspring of related parents suffer reduced reproductive success, a phenomenon known as inbreeding depression. In humans, the importance of this effect has remained unclear, partly because reproduction between close relatives is both rare and frequently associated with confounding social factors. Here, using genomic inbreeding coefficients (FROH) for >1.4 million individuals, we show that FROH is significantly associated (p < 0.0005) with apparently deleterious changes in 32...
1 CitationsSource
#1Rotem Botvinik-Nezer (TAU: Tel Aviv University)H-Index: 2
#2Roni Iwanir (TAU: Tel Aviv University)H-Index: 1
Last.Tom Schonberg (TAU: Tel Aviv University)H-Index: 14
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There is an ongoing debate about the replicability of neuroimaging research. It was suggested that one of the main reasons for the high rate of false positive results is the many degrees of freedom researchers have during data analysis. In the Neuroimaging Analysis Replication and Prediction Study (NARPS), we aim to provide the first scientific evidence on the variability of results across analysis teams in neuroscience. We collected fMRI data from 108 participants during two versions of the mix...
1 CitationsSource
#2Felix HolzmeisterH-Index: 5
Last.Tom SchonbergH-Index: 14
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Data analysis workflows in many scientific domains have become increasingly complex and flexible. To assess the impact of this flexibility on functional magnetic resonance imaging (fMRI) results, the same dataset was independently analyzed by 70 teams, testing nine ex-ante hypotheses. The flexibility of analytic approaches is exemplified by the fact that no two teams chose identical workflows to analyze the data. This flexibility resulted in sizeable variation in hypothesis test results, even fo...
1 CitationsSource
#1Elle Parslow (HHS: Stockholm School of Economics)
#2Eva Ranehill (University of Gothenburg)H-Index: 9
Last.Anna Dreber (HHS: Stockholm School of Economics)H-Index: 30
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Many studies report on the association between 2D:4D, a putative marker for prenatal testosterone exposure, and economic preferences. However, most of these studies have limited sample sizes and test multiple hypotheses (without preregistration). In this study we mainly replicate the common specifications found in the literature for the association between the 2D:4D ratio and risk taking, the willingness to compete, and dictator game giving separately. In a sample of 330 women we find no robust ...
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#1Anna DreberH-Index: 3
#2Magnus JohannessonH-Index: 84
Last.Magnus JohannessonH-Index: 1
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#1Patrick Turley (Broad Institute)H-Index: 13
#2Raymond K. Walters (Broad Institute)H-Index: 20
Last.Daniel J. Benjamin (SC: University of Southern California)H-Index: 27
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In the version of the paper initially published, no competing interests were declared. The ‘Competing interests’ statement should have stated that B.M.N. is on the Scientific Advisory Board of Deep Genomics. The error has been corrected in the HTML and PDF versions of the article.
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#2Eirik StrømlandH-Index: 2
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#1Eirik StrømlandH-Index: 2
#2Magnus JohannessonH-Index: 84
view all 3 authors...
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