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The heterogeneity statistic I2 can be biased in small meta-analyses

Overview of attention for article published in BMC Medical Research Methodology, April 2015
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About this Attention Score

  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (91st percentile)
  • High Attention Score compared to outputs of the same age and source (95th percentile)

Mentioned by

news
1 news outlet
blogs
1 blog
twitter
11 X users

Citations

dimensions_citation
753 Dimensions

Readers on

mendeley
497 Mendeley
Title
The heterogeneity statistic I2 can be biased in small meta-analyses
Published in
BMC Medical Research Methodology, April 2015
DOI 10.1186/s12874-015-0024-z
Pubmed ID
Authors

Paul T von Hippel

X Demographics

X Demographics

The data shown below were collected from the profiles of 11 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 497 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 1 <1%
Germany 1 <1%
Brazil 1 <1%
Unknown 494 99%

Demographic breakdown

Readers by professional status Count As %
Student > Master 76 15%
Student > Ph. D. Student 71 14%
Student > Bachelor 59 12%
Researcher 54 11%
Other 22 4%
Other 70 14%
Unknown 145 29%
Readers by discipline Count As %
Medicine and Dentistry 113 23%
Psychology 43 9%
Biochemistry, Genetics and Molecular Biology 21 4%
Nursing and Health Professions 21 4%
Agricultural and Biological Sciences 20 4%
Other 110 22%
Unknown 169 34%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 20. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 28 November 2023.
All research outputs
#1,845,884
of 25,837,817 outputs
Outputs from BMC Medical Research Methodology
#235
of 2,318 outputs
Outputs of similar age
#23,015
of 281,475 outputs
Outputs of similar age from BMC Medical Research Methodology
#1
of 23 outputs
Altmetric has tracked 25,837,817 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 92nd percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 2,318 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 10.7. This one has done well, scoring higher than 89% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 281,475 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 91% of its contemporaries.
We're also able to compare this research output to 23 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 95% of its contemporaries.