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Advanced Scientometrics Workshop Advanced Scientometrics Workshop Nilofar Barahmand 1 Phd Student of Library and Information Sciences [email protected] 2 Author Level Metrics in Scopus Productivity Impact Document Count Citation Count With out self citation H- index Field-weighted Citation Impact (FWCI) h-index 3 The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. “A scientist has index h if h of his or her Np papers have at least h citations each and the other (Np – h) papers have ≤h citations each.” 4 h- index: 5 Scopus Merge Author 6 Field-weighted Citation Impact (FWCI) Entity Subject Area Citation/Paper Researcher A Clinical Medicine 3 Researcher B Mathematics 1 Which one’s Performance is Better? 7 Field-weighted Citation Impact (FWCI) Field-Weighted Citation Impact is a Ratio that takes into account the differences in research behavior across disciplines. Field-Weighted Citation Impact is the ratio of the total citations actually received by the denominator’s output, and the total citations that would be expected based on the average of the subject field, year & document type. 8 Field-weighted Citation Impact (FWCI) Entity Subject Area Citation/Paper Researcher A Clinical Medicine 3 Researcher B Mathematics 1 Which one’s Performance is Better? Field-Weighted Entity Subject Area Citation Impact Researcher A Clinical Medicine 1.5 Researcher B Mathematics 3 Article Level Metrics in Scopus 9 Citation count and percentile benchmark Field-Weighted Citation Impact (FWCI) Altmetrics Altmetrics is a quantitative measure of Scholarly Activity Downloads and posts in common research tools the quality and quantity of attention such as Mendeley and CiteULike that a scholarly work is receiving through social media, citations, and Mentions characterized by rapid, brief engagement article downloads. Social Activity on platforms used by the public, such as Twitter, Facebook and Google+ Altmetrics are not meant to replace Scholarly Reviews, articles and blogs by experts and citation counts or the h-index, but scholars, such as F1000 Prime, research blogs and instead compliment the metrics with Commentary Wikipedia additional data. Coverage of research output in the mass media Mass Media (e.g., coverage in top tier media media) Citation count and percentile benchmark 10 Citation count: The Citation Count shows how many times a publication has been cited. Citation benchmarking: Citation benchmarking shows how citations received by this article compare with the average for similar articles. 99th percentile is high, and indicates an article in the top 1% globally. Citation benchmarking takes into account: The date of publication The document type (number of articles allowing) Disciplines associated with its source Citation benchmarking compares articles within an 18 month window and is computed separately for each of its sources' disciplines. 11 Field-weighted Citation Impact (FWCI) Entity Subject Area Citation Article A Clinical Medicine 3 Article B Mathematics 1 Which one’s Performance is Better? 12 Field-weighted Citation Impact (FWCI) Field-Weighted Citation Impact is a Ratio that takes into account the differences in research behavior across disciplines. Field-Weighted Citation Impact is the ratio of the total citations actually received by the denominator’s output, and the total citations that would be expected based on the average of the subject field, year & document type. 13 Field-weighted Citation Impact (FWCI) FWCI=1 means that the output performs just as expected for the global average. FWCI>1 means that the output is more cited than expected according to the global average; for example, 1.48 means 48% more cited than expected. FWCI<1 means that the output is cited less than expected according to the global average. 14 Field-weighted Citation Impact (FWCI) Entity Subject Area Citation Article A Clinical Medicine 3 Article B Mathematics 1 Which one’s Performance is Better? Field-Weighted Entity Subject Area Citation Impact Article A Clinical Medicine 1.5 Article B Mathematics 3 15 Journal Metrics Journal metrics provide information on the comparative performance of academic journals. Journal metrics are statistics, usually based on citation counts. Journal metrics can also be used to rank journals. Commonly used journal metrics are: • Impact factor • CiteScore • h- index • SJR • SNIP • Quartile 16 Impact Factor The Journal Impact Factor reflects the average number of citations to recent articles published in that journal. It’s one measure of the relative importance of a journal within its field. High impact factor ~ more important A = the number of times articles published in 2012 and 2013 were cited by indexed journals during 2014. B = the total number of "citable items" published in 2012 and 2013. A/B = 2014 impact factor 17 CiteScore CiteScore metrics calculate the citations from all documents in year one to all documents published in the prior three years for a title. As an example, to calculate a 2015 value, CiteScore counts the citations received in 2015 to documents published in 2012, 2013 or 2014. This number is divided by the number of documents indexed on Scopus published in 2012, 2013 and 2014. 18 H-index 19 CiteScore rank and trend 20 Snip: Source Normalized Impact per Paper SNIP measures a source’s contextual citation impact by weighting citations based on the total number of citations in a subject field. It helps you make a direct comparison of sources in different subject fields. SNIP takes into account characteristics of the source's subject field, which is the set of documents citing that source. SNIP is the ratio of a source's average citation count per paper and the citation potential of its subject field. 21 SJR (SCImago Journal Rank) SJR is weighted by the prestige of a journal. Subject field, quality, and reputation of the journal have a direct effect on the value of a citation. SJR assigns relative scores to all of the sources in a citation network. Its methodology is inspired by the Google PageRank algorithm, in that not all citations are equal. A source transfers its own 'prestige', or status, to another source through the act of citing it. A citation from a source with a relatively high SJR is worth more than a citation from a source with a lower SJR. 22 Scimago Journal & Country Rank http://www.scimagojr.com/ 23 Scimago Journal & Country Rank 24 Journal Citation Ranking and Quartile Scores (Q1-Q4) In ISI: Based on Impact Factor (IF) data, the Journal Citation Reports published by Thomson Reuters (see also here) provides yearly rankings of science and social science journals, in the subject categories relevant for the journal (in fact, there may be more than one). Quartile rankings are therefore derived for each journal in each of its subject categories according to which quartile of the IF distribution the journal occupies for that subject category. Q1 denotes the top 25% of the IF distribution, Q2 for middle-high position (between top 50% and top 25%), Q3 middle-low position (top 75% to top 50%), and Q4 the lowest position (bottom 25% of the IF distribution). 25 Journal Citation Ranking and Quartile Scores (Q1-Q4) In Scopus: Based on CiteScore and SJR data Scopus provides yearly rankings of journals in the subject categories relevant for the journal (in fact, there may be more than one). Quartile rankings are therefore derived for each journal in each of its subject categories according to which quartile of the on CiteScore and SJR distribution the journal occupies for that subject category. Q1 denotes the top 25% of the on CiteScore and SJR distribution, Q2 for middle-high position (between top 50% and top 25%), Q3 middle-low position (top 75% to top 50%), and Q4 the lowest position (bottom 25% of the on CiteScore and SJR distribution). 26 Journal Citation Ranking and Quartile Scores (Q1-Q4) 27 Journal Finders Elsevier Springer Ulrich 28 Thank you for your attention!.
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