Evidence map›Paper›PMID 33024165›Full record

ArticleScientific reports2020

Improving reproducibility in animal research by splitting the study population into several 'mini-experiments'.

Vanessa Tabea von Kortzfleisch, Natasha A Karp, Rupert Palme, Sylvia Kaiser, Norbert Sachser, S Helene Richter

Abstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

45 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Mechanisms underlying end-organ injury in sleep apnoea.The European respiratory journal · 2026
    Review
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. The welfare of farmed Nile tilapia: a review.Frontiers in veterinary science · 2025
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Vanessa Tabea von KortzfleischDepartment of Behavioural Biology, University of Münster, Badestraße 13, Münster, Germany. v_vonk01@uni-muenster.de.
Natasha A KarpData Sciences and Quantitative Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK.
Rupert PalmeDepartment of Biomedical Sciences, University of Veterinary Medicine, Vienna, Austria.
Sylvia KaiserDepartment of Behavioural Biology, University of Münster, Badestraße 13, Münster, Germany.
Norbert SachserDepartment of Behavioural Biology, University of Münster, Badestraße 13, Münster, Germany.
S Helene RichterDepartment of Behavioural Biology, University of Münster, Badestraße 13, Münster, Germany. richterh@uni-muenster.de.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In light of the hotly discussed 'reproducibility crisis', a rethinking of current methodologies appears essential. Implementing multi-laboratory designs has been shown to enhance the external validity and hence the reproducibility of findings from animal research. We here aimed at proposing a new experimental strategy that transfers this logic into a single-laboratory setting. We systematically introduced heterogeneity into our study population by splitting an experiment into several 'mini-experiments' spread over different time points a few weeks apart. We hypothesised to observe improved reproducibility in such a 'mini-experiment' design in comparison to a conventionally standardised design, according to which all animals are tested at one specific point in time. By comparing both designs across independent replicates, we could indeed show that the use of such a 'mini-experiment' design improved the reproducibility and accurate detection of exemplary treatment effects (behavioural and physiological differences between four mouse strains) in about half of all investigated strain comparisons. Thus, we successfully implemented and empirically validated an easy-to-handle strategy to tackle poor reproducibility in single-laboratory studies. Since other experiments within different life science disciplines share the main characteristics with the investigation reported here, these studies are likely to also benefit from this approach.

Indexed as

Animal ExperimentationAnimals, LaboratoryReproducibility of ResultsResearch DesignAnimalsMice, Inbred Strains

Identifiers

PMID33024165
PMCPMC7538440

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.