Cited by 868Meta-analysis and systematic reviewsPsychology Research and BibliometricsStatistics Education and Methodologies

Erroneous analyses of interactions in neuroscience: A problem of significance

Nieuwenhuis, Sander, Forstmann, Birte U, Wagenmakers, Eric-Jan·2011·Nature Neuroscience

Abstract

In theory, a comparison of two experimental effects requires a statistical test on their difference. In practice, this comparison is often based on an incorrect procedure involving two separate tests in which researchers conclude that effects differ when one effect is significant (P < 0.05) but the other is not (P > 0.05). We reviewed 513 behavioral, systems and cognitive neuroscience articles in five top-ranking journals (Science, Nature, Nature Neuroscience, Neuron and The Journal of Neuroscience) and found that 78 used the correct procedure and 79 used the incorrect procedure. An additional analysis suggests that incorrect analyses of interactions are even more common in cellular and molecular neuroscience. We discuss scenarios in which the erroneous procedure is particularly beguiling.

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Crossref · 10.1038/nn.2886

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8 of 8 references verified0 citation errors · 0 not checkable

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  • Use of multiple analyses on the same data set and selective reports of statistical methods used, or insufficient correction for multiple comparisons, can cause inflation in effects.

    “Use of multiple analyses on the same data set and selective reports of statistical methods used, or insufficient correction for multiple comparisons, can cause inflation in effects (29).”
  • Priming and awareness are typically tested by comparing two separate tests.

    “priming and awareness are typically tested by comparing two separate tests”

    From Evidence for unconscious priming using a Bayesian single-subject approach (2026) · cites this paper as Nieuwenhuis et al. 2011

  • The double t-test approach is fundamentally flawed.

    “However, this approach is fundamentally flawed (Nieuwenhuis et al. 2011, Meyen et al. 2022).”

    From Evidence for unconscious priming using a Bayesian single-subject approach (2026) · cites this paper as Nieuwenhuis et al. 2011

  • In the double t-test approach, the comparison of two experimental effects is performed by executing two separate t-tests and independently establishing significance for each; when one is significant and the other is not, one concludes they are different.

    “In this approach, the comparison of two experimental effects is performed by executing two separate t-tests and independently establishing significance for each. When one turns out to be significant and the other is not, one concludes that they are different (Nieuwenhuis et al. 2011).”

    From Evidence for unconscious priming using a Bayesian single-subject approach (2026) · cites this paper as Nieuwenhuis et al. 2011

  • The double t-test approach is problematic because comparing two experimental effects requires a statistical test on their difference.

    “The combination of two Bayesian t-tests (one to determine the presence or absence of awareness and another to determine the presence of a priming effect) essentially suffers from the same problem as executing two frequentist t-tests: the comparison of two experimental effects requires a statistical test on their difference”

    From Evidence for unconscious priming using a Bayesian single-subject approach (2026) · cites this paper as Nieuwenhuis et al. 2011

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Authors
Nieuwenhuis, S., Forstmann, B. U., & Wagenmakers, E.-J.
Affiliations
  • Leiden University (NL)
  • University of Amsterdam (NL)
Corresponding author
Nieuwenhuis, Sander
Venue
Nature Neuroscience
Published
2011-08-26
Volume
14
Issue
9
Pages
1105-1107
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2165810797
Cited by
864
References
8
Citations by year
2026: 51 · 2025: 32 · 2024: 37 · 2023: 60 · 2022: 52 · 2021: 83 · 2020: 61 · 2019: 63 · 2018: 61 · 2017: 57 · 2016: 57 · 2015: 47 · 2014: 69 · 2013: 57 · 2012: 65
FWCI
68.19
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • UvA-DARE (University of Amsterdam) (publishedVersion)
  • UvA-DARE (University of Amsterdam) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Topics
  • Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Psychology Research and Bibliometrics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistics Education and Methodologies
Keywords
interaction effects, effect size comparison, significance testing, statistical errors, two-sample t-test, neuroscience literature
MeSH terms
Animals, Humans, Neurons, Neurosciences, Statistics as Topic, Reproducibility of Results, Biomedical Research

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