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Category: Fake data

[98] Evidence of Fraud in an Influential Field Experiment About Dishonesty

Posted on August 17, 2021April 23, 2022 by Uri, Joe, & Leif

This post is co-authored with a team of researchers who have chosen to remain anonymous. They uncovered most of the evidence reported in this post. These researchers are not connected in any way to the papers described herein. *** In 2012, Shu, Mazar, Gino, Ariely, and Bazerman published a three-study paper in PNAS (.htm) reporting…

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[77] Number-Bunching: A New Tool for Forensic Data Analysis

Posted on May 25, 2019November 18, 2020 by Uri Simonsohn

In this post I show how one can analyze the frequency with which values get repeated within a dataset – what I call “number-bunching” – to statistically identify whether the data were likely tampered with. Unlike Benford’s law (.htm), and its generalizations, this approach examines the entire number at once, not only the first or…

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[74] In Press at Psychological Science: A New 'Nudge' Supported by Implausible Data

Posted on December 5, 2018November 18, 2020 by Guest co-author: Frank Yu, with Leif and Uri

Today Psychological Science issued a Corrigendum (.htm) and an expression of concern (htm) for a paper originally posted online in May 2018 (.htm). This post will spell out the data irregularities we uncovered that eventually led to the two postings from the journal today. We are not convinced that those postings are sufficient. It is…

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[40] Reducing Fraud in Science

Posted on June 29, 2015February 11, 2020 by Uri Simonsohn

Fraud in science is often attributed to incentives: we reward sexy-results→fraud happens. The solution, the argument goes, is to reward other things.  In this post I counter-argue, proposing three alternative solutions. Problems with the Change the Incentives solution. First, even if rewarding sexy-results caused fraud, it does not follow we should stop rewarding sexy-results. We…

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[21] Fake-Data Colada: Excessive Linearity

Posted on May 8, 2014February 11, 2020 by Leif and Uri

Recently, a psychology paper (.html) was flagged as possibly fraudulent based on statistical analyses (.pdf). The author defended his paper (.html), but the university committee investigating misconduct concluded it had occurred (.pdf). In this post we present new and more intuitive versions of the analyses that flagged the paper as possibly fraudulent. We then rule…

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[19] Fake Data: Mendel vs. Stapel

Posted on April 14, 2014February 11, 2020 by Uri Simonsohn

Diederik Stapel, Dirk Smeesters, and Lawrence Sanna published psychology papers with fake data. They each faked in their own idiosyncratic way, nevertheless, their data do share something in common. Real data are noisy. Theirs aren't. Gregor Mendel's data also lack noise (yes, famous peas-experimenter Mendel). Moreover, in a mathematical sense, his data are just as…

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[1] "Just Posting It" works, leads to new retraction in Psychology

Posted on September 17, 2013February 11, 2020 by Uri Simonsohn

The fortuitous discovery of new fake data. For a project I worked on this past May, I needed data for variables as different from each other as possible. From the data-posting journal Judgment and Decision Making I downloaded data for ten, including one from a now retracted paper involving the estimation of coin sizes. I created…

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Recent Posts

  • [107] Meaningless Means #3: The Truth About Lies
  • [106] Meaningless Means #2: The Average Effect of Nudging in Academic Publications is 8.7%
  • [105] Meaningless Means #1: The Average Effect
    of Nudging Is d = .43
  • [104] Meaningless Means: Some Fundamental Problems With Meta-Analytic Averages
  • [103] Mediation Analysis is Counterintuitively Invalid

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Posts on similar topics

Fake data
  • [98] Evidence of Fraud in an Influential Field Experiment About Dishonesty
  • [77] Number-Bunching: A New Tool for Forensic Data Analysis
  • [74] In Press at Psychological Science: A New 'Nudge' Supported by Implausible Data
  • [40] Reducing Fraud in Science
  • [21] Fake-Data Colada: Excessive Linearity
  • [19] Fake Data: Mendel vs. Stapel
  • [1] "Just Posting It" works, leads to new retraction in Psychology

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© 2021, Uri Simonsohn, Leif Nelson, and Joseph Simmons. For permission to reprint individual blog posts on DataColada please contact us via email..