Journal metrics update 2021

21 September 2021

All-Journals-Image-425x500px-Dennis-Kunkel-Microscopy-SPL.jpg

The Microbiology Society is pleased to provide an update on our journal and article metrics. Our latest updates include a suite of metrics at both the journal level, and the article level, and demonstrate the continued excellence of the content published in the journals.

We would like to thank our authors and Society members for continuing to spread the word about the journals and the value of publishing for the community. Publishing in our journals directly supports all of the other activities undertaken by the Microbiology Society, including our events, policy work and grants and prizes.

We saw general increases in the vast majority of the metrics we track regularly, and as signatories of the San Francisco Declaration on Research Assessment, we will always be providing them together with no particular emphasis given to any one metric.

Below you will find metrics highlighting journal-level performance. Definitions of each metric are provided at the end.

Metric

Microbiology

Journal of General Virology

Journal of Medical Microbiology

International Journal of Systematic and Evolutionary Microbiology

Microbial Genomics

2-year Journal Impact Factor

2.7

3.8

2.5

 2.7

5.2

5-year Journal Impact Factor

2.9

3.7

2.8

 2.9

6.6

Immediacy Index

0.8

1.6

0.8

 0.8

1.0

Cited half-life

13.7 years

12.9 years

9.9 years

 8.5 years

3.0 years

CiteScore

4.7

7.3

4.1

 4.4

6.1

SNIP

0.8

1.4

1.0

 1.3

1.5

In addition to the journal-level statistics, we also collate a number of stats based on the performance of the articles published therein. While these give a snapshot of the general level of interest in each article, we will always recommend individual articles be evaluated on their own merits - on our article pages we provide widgets highlighting the citations and Altmetric attention generated, and readers can see how many others have read the article by clicking on the Info tab at the top.

Metric

Microbiology

Journal of General Virology

Journal of Medical Microbiology

International Journal of Systematic and Evolutionary Microbiology

Microbial Genomics

Access Microbiology

Unique full-text downloads

2,199,192

1,584,183

1,261,543

4,884,024

198,117

80,137

Mean Altmetric score

9.6

11.7

7.6

12.4   

12.0

2.7

Median Altmetric score

4

3

2

11

7

1
  • 2-year Journal Impact Factor: The Journal Impact Factor is defined as all citations to the journal in the current JCR year to items published in the previous two years, divided by the total number of scholarly items (these comprise articles, reviews, and proceedings papers) published in the journal in the previous two years.
  • 5-year Impact Factor: The 5-year journal Impact Factor is the average number of times articles from the journal published in the past five years have been cited in the JCR year. It is calculated by dividing the number of citations in the JCR year by the total number of articles published in the five previous years.
  • Immediacy Index: The Immediacy Index is the average number of times an article is cited in the year it is published.
  • Cited half-life: The median age of the articles that were cited in the JCR year. Half of a journal's cited articles were published more recently than the cited half-life.
  • CiteScore: CiteScore measures average citations received per document published in the serial.
  • SNIP (Source Normalized Impact per Paper): The SNIP measures actual citations received relative to citations expected for the serial’s subject field.
  • Altmetrics: Altmetrics are non-traditional metrics proposed as an alternative to citation impact metrics. A paper’s Altmetric score is a weighted measure of its mentions in the press and on social media, among others, and is displayed on each article page.
  • All-Journals-Image-425x500px-Dennis-Kunkel-Microscopy-SPL.jpg

    Supporting authors with fee-free Open Access Publishing

    The Society is expanding its Publish and Read programme to help more researchers benefit from Open Access (OA) publishing. Publish and Read is designed to offer a frictionless OA experience for authors, maximum value for institutions, with minimum administration.

 

Image: Dennis Kunkel.

Back to news listings