Both databases keep track of the citations generated by the journals that they index. Citation data generated by these databases are currently being used internationally to measure the performance and quality of scholarly output of institutions and individual researchers. As such any literature search should include these two databases.
how many times an article has been cited (high citations indicating works with high impact)
all publications citing an article
the author and the journal citing an article (i.e. connections in research)
when the article has been cited (connections, speed of research)
key authors in a topic
key journals in a topic
each citation database only examines the citation counts of the journal titles indexed within it's database
if you haven't published in a journal indexed by that database, your publication will not be included
citation databases should be searched in addition to searching your subject database
variation of scores between the various citation databases?
The same publication can have a different result for the same metric (eg h index) in different databases
each database indexes a slightly different range of titles
each database may index a slightly different range of publications types
each database may index different content within a journal issue (e.g. cover to cover or main articles only)
Scopus indexes a wide selection of the key publications in a variety of subject and discipline areas.
Usefulness of Scopus Citation data
Scopus keeps track each time a Scopus item is cited or viewed (on Scopus)
citation data can be used to identify a topic or discipline's seminal works, key authors, key journal titles, who is citing whom etc.
the citations collected are then used to generate a wide range of Citation Metrics.
Which titles are indexed by Scopus?:
Which are the highly ranked Scopus titles?
Check the Sources tab within Scopus, Scimago database and Journal Metrics database; these latter two databases use Scopus citation data to rank journals within a a subject and discipline area, based on its citation data.
What are the main Performance metrics used in Scopus:
(see Quick Reference Card for Research Metrics)
This measures the influence of a journal by taking into account both the number of citations received and the importance of the citing journal.
SJR facilitates the comparison of journals across different subjects by normalising citation behaviour between subject fields.
Normalisation allows journals across all disciplines to be compared.
Where can SJR be found in the Scopus database?
Where can SJR be found outside the Scopus database?
CiteScore calculates the average number of citations received in a calendar year by all items published in that journal in the preceding three years. The calendar year to which a serial title’s issues are assigned is determined by their cover dates, and not the dates that the serial issues were made available online. more about CiteScore
SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field. more about SNIP
IPP measures the ratio of citations per article published in the journal. more about IPP
The Web of Science indexes a selection of the key publications in a variety of subject and discipline areas.
Usefulness of Web of Science Citation data
the Web of Science tracks each time a Web of Science item is cited
citation data is used to identify important information about a topic or discipline, seminal works, key authors, key journal titles, who is citing whom etc.
the citations collected are then used to generate the a wide range of Citation Metrics.
Content of the Web of Science Core Collection?
To find out exactly which databases are being searched, click on the 2 drop down menus.
An institutions's subscriptions will have an impact on:
Like for like:
Normalisation (allows comparison across disciplines):
Citation counts are higher on Google Scholar than on Scopus or the Web of Science as Google Scholar draws its citation data from a larger range of titles.
Dimensions is a very new product which combines a citation database, a research analytics suite, and modern article discovery and access functionality.
Dimensions provides information about citations of publications (including patents), but it also provides links to grant funding, clinical trials, normalised metrics for fields/disciplines and institutions.
Rather than drawing metrics from a defined list of publications as Scopus and Web of Science does, Dimensions offers research filters to limit results to journals by Publication year, Researcher, Fields of Research, Publication type, Source title, Journal List (i.e. specific databases) and Open access articles. Results can be sorted by relevance, publication date, citations, Altmetric attention score (although Plum analytic scores are also given) and the new databases metric RCR.
The Relative Citation Ratio (RCR) is an article-level metric that indicates the relative citation performance of an article when compared to other articles in its area of research.
A value of more than 1.0 shows a citation rate above average for this group
Dimensions integrates with ReadCube, which facilitates the indexing of article fulltext discovery and also the display of the fulltext of articles from public source like PubMedCentral or arXiv or publishers who have agreed to make their content available through ReadCube.