Author: Dalmeet Singh Chawla

What does “reproducibility” mean? New paper seeks to standardize the lexicon

Science Translational MedicineWhat is the difference between “reproducible” and “replicable”? And how does each relate to results that are “generalizable” and “robust”?

Researchers are using these terms interchangeably, creating confusion over what exactly is needed to confirm a scientific result, argues a new paper published today in Science Translational Medicine.

Here’s how the US National Science Foundation (NSF) defines “reproducibility,” according to the authors: Continue reading What does “reproducibility” mean? New paper seeks to standardize the lexicon

Epilepsy researcher gets retraction, correction after former colleague flags work

EpilipsiaEpilepsy researcher Toni Schneider has received a retraction and a correction in quick succession, after a former colleague raised red flags about the work. 

The retraction for Schneider, based at the University of Köln in Germany, is for “unintentional inclusion of erroneous data” due to limitations of the recording system used in the paper, according to the notice. 

Marco Weiergräber, a former colleague of Schneider’s, has claimed that the authors of the paper did not use the test properly. The journal editor, however, told us he believes the original analysis is an “honest mistake,” and there is “no evidence” to suggest that the authors intentionally published incorrect analyses.

Here’s the retraction notice, issued by the journal in March 2016: Continue reading Epilepsy researcher gets retraction, correction after former colleague flags work

Neuroscientist forged co-author’s signature, submitted paper without consent

European Journal of Neuroscience cover2The European Journal of Neuroscience has pulled a paper after learning that one author’s name had been included without his consent.

Co-editor-in-chief of the journal, Paul Bolam, told us that the Shandong University of Medicine in China (where the work was carried out) conducted an investigation and found “a serious case of academic misconduct” — one author had forged the signature of another researcher, in order to add him as a co-author on a project in which he had not participated.

Here’s the retraction notice, which tells us a bit more: Continue reading Neuroscientist forged co-author’s signature, submitted paper without consent

Context matters when replicating experiments, argues study

PNASBackground factors such as culture, location, population, or time of day affect the success rates of replication experiments, a new study suggests.

The study, published today in the Proceedings of the National Academy of Sciences, used data from the psychology replication project, which found only 39 out of 100 experiments live up to their original claims. The authors conclude that more “contextually sensitive” papers — those whose background factors are more likely to affect their replicability — are slightly less likely to be reproduced successfully.

They summarize their results in the paper:

Continue reading Context matters when replicating experiments, argues study

Editors say they missed “fairly obvious clues” of third party tampering, publish fake peer reviews

BJCP Cover

The editors of a journal that recently retracted a paper after the peer-review process was “compromised” have published the fake reviews, along with additional details about the case.

In the editorial titled “Organised crime against the academic peer review system,” Adam Cohen and other editors at the British Journal of Clinical Pharmacology say they missed “several fairly obvious clues that should have set alarm bells ringing.” For instance, the glowing reviews from supposed high-profile researchers at Ivy League institutions were returned within a few days, were riddled with grammar problems, and the authors had no previous publications. 

The case is one of many we’ve recently seen in which papers are pulled due to actions of a third party. 

The paper was submitted on August 5, 2015. From the beginning, the timing was suspect, Cohen — the director for the Centre for Human Drug Research in The Netherlands — and his colleagues note: Continue reading Editors say they missed “fairly obvious clues” of third party tampering, publish fake peer reviews

Dutch university ordered to pay economist after she was accused of plagiarism

VU UniversityA court in the Netherlands has fined Vrije Universiteit Amsterdam (VU) 7,500 euros to compensate for “immaterial damage” to an economist accused of plagiarism.

Karima Kourtit, a researcher at VU, has been at the receiving end of anonymous complaints to her institution accusing her of plagiarism and her professor, high-profile economist Peter Nijkamp, of duplication (i.e. self-plagiarism). Kourtit is now seeking to prosecute the unnamed source of the complaint for defamation; the VU told us it will no longer accept fully anonymous complaints.

The case began when VU cancelled Kourtit’s thesis defense for plagiarism, and a report published on the VSNU, the Association of Universities, accused Nijkamp of self-plagiarism. Two of Nijkamp’s papers have been retracted as a result of the investigation; Kourtit is an author on one of the retracted papers.

A VU spokesperson told us:

Continue reading Dutch university ordered to pay economist after she was accused of plagiarism

Journal pulls parasite paper over potential for patient harm

Parasitology ResearchA journal has retracted a paper about a molecular diagnosis for leishmaniasis out of concern it could lead to incorrect clinical diagnoses. 

According to Parasitology Research, all data behind the figures in the main manuscript and supporting information are correct, but the authors’ misinterpretation of the data could lead doctors to diagnose patients incorrectly. 

Let’s take a look at the retraction notice, which tells us a bit more about the nature of the problem: Continue reading Journal pulls parasite paper over potential for patient harm

Nature fixes highly cited paper suggesting food additives hurt the gut

Nature_latest coverA 2015 study about dietary emulsifiers has been corrected by Nature after another researcher pointed out a few ambiguities.

When it first appeared, the study — which showed emulsifiers cause inflammation in the guts of mice — received a fair amount of media attention, including from Nature’s own news department. But since publication, a researcher noted some imprecision around the ages of mice used in the sample, affecting the paper’s calculations of weight gain over time. Andrew Gewirtz, co-author of the study from Georgia State University, told us the change did not affect the conclusions of the paper.

Here’s the corrigendum for “Dietary emulsifiers impact the mouse gut microbiota promoting colitis and metabolic syndrome”: Continue reading Nature fixes highly cited paper suggesting food additives hurt the gut

PLOS ONE pulls maize paper with Photoshopped images

PLOS OnePLOS ONE has retracted a paper after editors learned that some of the images had been manipulated using Photoshop.

First author of the paper, Chuan Li, confirmed that he was responsible, and told Retraction Watch he apologizes for his “low-level mistake.”

Zhongfu Ni, last author of the paper from the China Agricultural University in Beijing, told us that all the co-authors agree with the retraction.

Here’s the retraction notice: Continue reading PLOS ONE pulls maize paper with Photoshopped images

Dev Cell paper retracted after author admits to doctoring data

Developmental CellThe authors of a Developmental Cell paper have retracted it after the first author admitted to manipulating and falsifying data and reagents.

The problems came to light after the authors couldn’t reproduce the findings, about a mechanism underlying meiosis. When questioned about the matter, the first author of the paper, Saurav Malhotra, admitted to doctoring data and materials. 

Here’s the retraction notice to the paper, “The Anaphase-Promoting Complex/Cyclosome Is Essential for Entry into Meiotic M-Phase:” Continue reading Dev Cell paper retracted after author admits to doctoring data