Evidence map›Paper›PMID 21305027›Full record

ArticlePloS one2011

Effect of population heterogenization on the reproducibility of mouse behavior: a multi-laboratory study.

S Helene Richter, Joseph P Garner, Benjamin Zipser, Lars Lewejohann, Norbert Sachser, Chadi Touma, Britta Schindler, Sabine Chourbaji, Christiane Brandwein, Peter Gass and 6 more

Abstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
–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

81 citing papers in PubMed.

  1. Review
  2. Mechanisms underlying end-organ injury in sleep apnoea.The European respiratory journal · 2026
    Review
  3. Testing the Impact of Prey Presentation Method on the Feeding Kinematics of Terrestrial and Aquatic Ambystomatidae.Journal of experimental zoology. Part A, Ecological and integrative physiology · 2025
    Article
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21 more citing papers are in PubMed but not listed here.

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

16 authors.

S Helene RichterAnimal Models in Psychiatry, Central Institute of Mental Health, Mannheim, Germany.
Joseph P Garner
Benjamin Zipser
Lars Lewejohann
Norbert Sachser
Chadi Touma
Britta Schindler
Sabine Chourbaji
Christiane Brandwein
Peter Gass
Niek van Stipdonk
Johanneke van der Harst
Berry Spruijt
Vootele Võikar
David P Wolfer
Hanno Würbel

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In animal experiments, animals, husbandry and test procedures are traditionally standardized to maximize test sensitivity and minimize animal use, assuming that this will also guarantee reproducibility. However, by reducing within-experiment variation, standardization may limit inference to the specific experimental conditions. Indeed, we have recently shown in mice that standardization may generate spurious results in behavioral tests, accounting for poor reproducibility, and that this can be avoided by population heterogenization through systematic variation of experimental conditions. Here, we examined whether a simple form of heterogenization effectively improves reproducibility of test results in a multi-laboratory situation. Each of six laboratories independently ordered 64 female mice of two inbred strains (C57BL/6NCrl, DBA/2NCrl) and examined them for strain differences in five commonly used behavioral tests under two different experimental designs. In the standardized design, experimental conditions were standardized as much as possible in each laboratory, while they were systematically varied with respect to the animals' test age and cage enrichment in the heterogenized design. Although heterogenization tended to improve reproducibility by increasing within-experiment variation relative to between-experiment variation, the effect was too weak to account for the large variation between laboratories. However, our findings confirm the potential of systematic heterogenization for improving reproducibility of animal experiments and highlight the need for effective and practicable heterogenization strategies.

Indexed as

Animal ExperimentationAnimalsAnimals, LaboratoryBehavior, AnimalFemaleMiceReference StandardsReproducibility of ResultsResearch Design

Identifiers

PMID21305027
PMCPMC3031565

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Registered trials

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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.