Journal Metrics in Scopus: SCImago Journal Rank (SJR)
Recently, Library Connect worked with librarian Jenny Delasalle to create a set of quick reference cards on research impact metrics. Both a poster (11x17) sized version, which includes all the metrics on one page, and a larger format featuring 4 metrics cards per page, are available for download. Each card provides a quick summary of the metric — including how it’s calculated, what it measures and whether it applies to journals, authors or documents — and serves as a good jumping off point for further discussions around metrics. To add a bit more context regarding their specific relationship to Scopus, we will be looking at individual cards and providing the Scopus connection, starting with SCImago Journal Rank (SJR).
As stated in the card, SJR weights citations based on the source they come from.The subject field, quality and reputation of the journal have a direct effect on the value of a citation. SJR also normalizes for differences in citation behavior between subject fields. Further, SJR is calculated by SCImago Lab and developed from Scopus data.
SCImago is a research group from the Consejo Superior de Investigaciones Científicas (CSIC), University of Granada, Extremadura, Carlos III (Madrid) and Alcalá de Henares, dedicated to information analysis, representation and retrieval by means of visualization techniques.
How can you access and use SJR in Scopus?
In Scopus there are 4 main places to find a title’s SJR calculation (click on images to enlarge):
- The <Browse Sources> page
- The Journal Homepage
- From the <Source> tab when using the <Analyze search results> feature, and
- The <Compare journals> tool
Let's look more closely at the <Compare journals> tool (watch the quick video clip below). This tool allows you to gain a more complete analysis of the journal landscape. You can select up to 10 journals to upload into graphs for comparative analysis; and then compare the titles using a variety of metrics, including SJR. For example, if you are trying to identify the best and most prestigious journal to publish in, this tool offers helpful insights by allowing you to compare SJR calculations and trends for a set of journals at one time.
To further illustrate how this works, let's say you are looking for journals relating to Lung Cancer. Go to Scopus.com and:
- Click on <Compare journals>
- Search for “Lung Cancer” in the search box
- Select the journal titles you want to compare
- As you make your selections, the graphs will populate
From here, you can see the SJR values for your selected titles over time and compare the titles against each other. This graph can help answer questions like: ‘Is there a journal that seems to be on the rise?’ or ‘Is the journal with the highest value trending upward, maintaining or seem to be declining?’ The graphs give you a bit more visual insight into the measurements over time compared to a table or a singular value. You can even zoom in to look at a smaller window of time. NOTE: you can also compare the titles based on other metric values, such as SNIP (Source Normalized Impact per Paper) and IPP (Impact per Publication), which will be discussed in future posts.
Where can you find SJR values outside of the Scopus platform?
SJR is a publicly available metric and can also be attained outside of the Scopus platform. Here's how you can access SJR values from outside of Scopus.com:
- Download the Scopus Source List and find the SJR values from 2013 to 2015 listed in columns I, L and O
- Go to https://www.journalmetrics.com/and search the entire collection of journals covered by Scopus, along with their SJR, SNIP and IPP metrics going back to 1999.
- SCImago site: http://www.scimagojr.com/journalrank.php
You can learn more about <Browse sources>, <Analyze search results> and <Compare journals> in this recent webcast: