20- Understanding Journal Citation Metrics: Impact Factor, SJR, CiteScore & Eigenfactor

Source: https://www.youtube.com/watch?v=GTmyCqkiWvs

Which database powers the SCImago Journal Rank (SJR) indicator?

A) Clarivate Web of Science

B) Elsevier Scopus

C) Google Scholar

D) PubMed / MEDLINE

Correct Answer: B) Elsevier Scopus

Explanation: While the speaker in the transcript incorrectly stated that SJR uses Clarivate's Journal Citation Reports, SJR actually extracts its citation data entirely from Elsevier's Scopus database.

According to the updated official methodology, what is the length of the citation window used to calculate Elsevier's CiteScore?

A) 2 years

B) 3 years

C) 4 years

D) 5 years

Correct Answer: C) 4 years

Explanation: The speaker gave conflicting information, mentioning both 3 years and 5 years. In reality, while CiteScore originally launched with a 3-year window, Elsevier updated the methodology to a stable 4-year citation window.

Which of the following documents are included in the denominator when calculating CiteScore, distinguishing it from the historical Journal Impact Factor (JIF) calculation?

A) Only peer-reviewed research articles and reviews

B) Only articles, reviews, and conference papers

C) All document types published by the journal, including editorials, letters, and notes

D) Only documents that have received at least one citation

Correct Answer: C) All document types published by the journal, including editorials, letters, and notes

Explanation: CiteScore includes all document types indexed by Scopus in its denominator (such as editorials, letters, and opinion pieces). Clarivate's JIF historically excludes these from the denominator, focusing primarily on "citable items" like articles and reviews.

Which citation metric specifically excludes all journal self-citations and weights citations based on the "prestige" of the citing journal over a 5-year window?

A) CiteScore

B) Journal Impact Factor (JIF)

C) Eigenfactor Score

D) h-index

Correct Answer: C) Eigenfactor Score

Explanation: The Eigenfactor Score uses Clarivate data over a 5-year period, completely removes journal self-citations, and uses a PageRank-style algorithm to weight citations based on how often the citing journal itself is cited (its prestige).

Which of the following indexes is NOT a part of the Clarivate Web of Science Core Collection mentioned or implied in the correction of the speaker's statement?

A) Science Citation Index Expanded (SCIE)

B) Social Sciences Citation Index (SSCI)

C) Emerging Sources Citation Index (ESCI)

D) Scopus Index

Correct Answer: D) Scopus Index

Explanation: The speaker incorrectly limited Clarivate's system. Clarivate operates the Web of Science Core Collection (which includes SCIE, SSCI, AHCI, and ESCI). Scopus is a completely separate competitor database owned and operated by Elsevier.

Which specific indexing database acts as the sole data source for the SCImago Journal Rank (SJR)?

A. Elsevier Scopus

B. Google Scholar Metrics

C. Clarivate Web of Science (Core Collection)

D. PubMed Central (PMC)

Answer: A. Elsevier Scopus

Explanation: SJR is completely powered by the Scopus database, drawing its entire citation network from it.