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Contextualized scientometrics:
What’s behind the numbers?
Ludo Waltman
Centre for Science and Technology Studies (CWTS), Leiden University
International Forum on Quantitative Studies of Science and Technology
Zhejiang University, Hangzhou, China
April 14, 2019
Outline
• Bibliometric indicators for Chinese universities
• What’s behind the numbers?
• From representation to contextualization
• Data sources for contextualized scientometrics
• An agenda for the scientometric community
1
Bibliometric indicators
for Chinese
universities
2
CWTS Leiden Ranking
• Bibliometric ranking of major
universities worldwide
• Advanced methodology based
on most recent insights from
bibliometric research
• www.leidenranking.com
3
Data source: Clarivate Analytics Web of Science
Chinese universities
4
Fuzhou Univ.
Hong Kong Univ.
Science and Tech.
City Univ.
Hong Kong
Zhejiang Univ.
Shanghai Jiao
Tong Univ.
Tsinghua Univ.
Peking Univ.
Fudan Univ.
Chinese universities vs. US universities
5
Rockefeller Univ.
Harvard Univ.
Johns Hopkins
Univ.
Univ. Michigan
Stanford Univ.MIT
Chinese universities vs. Dutch universities
6
Leiden Univ.
What’s behind the
numbers?
7
Leiden algorithm
8
Identifying research areas in citation networks
9
VOSviewer
10
Micro-level research areas
11
Social sciences
Biomed.
& health sciences
Math. & comp.
science
Physical
sciences & eng.
Life & earth sciences
Zhejiang University’s research strengths
12
Share of an area’s
highly cited
publications
authored by Zhejiang
University
Zhejiang University’s research strengths
(social sciences)
13
Share of an area’s
highly cited
publications
authored by
Zhejiang University
bibliometrics
China demography
housing
market
Area 1127 (China): Topics
14
Area 1127 (China): Focus of Zhejiang University
15
Area 145 (bibliometrics): Topics
16
Area 145 (bibliometrics): Focus of Zhejiang University
17
From representation to
contextualization
18
Representation vs. contextualization
Representation
1. Concepts of interest (e.g., production and impact) are specified
2. Scientometric indicators (e.g., publication and citation counts) are defined
to represent, or operationalize, the concepts
3. Decision making is based on, or supported by, the indicators
Contextualization
1. Scientometric information is made available in a variety of ways:
Statistics, distributions, network diagrams, publication lists, etc.
2. Interpretation is done by decision makers, not by scientometricians
3. Scientometric information provides context for decision making 19
Unlike representation, contextualization is difficult to
accomplish using closed data sources
20
Data sources for
contextualized
scientometrics
21
Initiative for Open Citations (I4OC)
22
https://i4oc.org/
Initiative for Open Citations (I4OC)
23
https://i4oc.org/
Support for I4OC
24
Large publishers not supporting I4OC
25
Scientometricians supporting open citations
26
www.issi-society.org/open-citations-letter/
Scientometricians supporting open citations
27
www.issi-society.org/open-citations-letter/
April 26, 2018:
• 324 signatories
• 46 countries
Scientometricians supporting open citations
28
www.issi-society.org/blog/posts/2018/april/open-citations-to-open-science/
Journal of Informetrics ‘flip’
29
Dimensions: Open data for research purposes
30
An agenda for the
scientometric
community
31
An agenda for the scientometric community
Scientometric practice
1. Promote responsible use of scientometrics
– Focus on contextualization instead of representation
2. Promote open metadata of scientific outputs
– Support open citations and open metadata initiatives such as I4OC
Scientometric research
3. Whenever possible, use data sources that facilitate reproducibility
– Use data sources to which other researchers also have access (e.g., Dimensions)
4. Support open metadata as author, reviewer, or editor
– Support the new Quantitative Science Studies journal!
32
Quantitative Science Studies
33
Thank you for your attention!
34

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Contextualized scientometrics: What's behind the numbers?