Transcript THOMSON REUTERS PRESENTATION TEMPLATE

Journal Citation Reports –
The Impact Factor
This presentation will discuss
• A basic introduction to Journal Citation Reports (JCR)
• Using the JCR to find a category of journals
• Ranking journals by Impact Factors in a given category
• How an Impact Factor is calculated
• Median and Aggregate Impact Factors for a category of
journals
• Accessing the Impact Factor from the Web of Science
Introduction
• JCR distills citation trend data for 10,000+ journals
from more than 25 million cited references indexed
by Thomson Reuters every year
• Science Edition and Social Sciences Edition
released annually
• Science Edition covers 7,200+ journals in 171
subject categories
• Social Sciences Edition covers 2,100+ journals in
55 subject categories
Access JCR from the Web of Knowledge
Subject Categories
View Journal data
Sort journals in the category
Full Record Page
Impact Factor
• TR calculates the a journal’s impact factor by:
dividing the number of citations made in 2008 to items published in
the previous two years (2006 & 2007) by the total number of articles
& reviews published in the previous two years
2008 cites to items published in 2007 and 2006
# of articles published in 2007 and 2006
2226
540
= 4.122
Journal Rank in categories
Journal Rank in categories
The Box plot
Journal self citation
To provide one the ability to easily compare self-citation rates among journals
particularly as this influences Impact factor calculations.
Category Impact Data
Category Data – Median and Aggregate Impact
Factors
• The Median Impact Factor for the subject category of Pediatrics is 1.252
• The Aggregate Impact Factor for Pediatrics is 1.932
Access to JCR from the Web of Science
Impact Factor Trend Graph
•Entry point into JCR from Web of Science
•Indicates the Journal’s Impact Factor over the latest five
years
Using JCR Wisely
You should not depend solely on citation data in your journal
evaluations. Citation data are not meant to replace informed peer
review. Careful attention should be paid to the many conditions
that can influence citation rates such as language, journal history
and format, publication schedule, and subject specialty.
The number of articles given for journals listed in JCR include
primarily original research and review articles. Editorials, letters,
news items, and meeting abstracts are usually not included in
article counts because they are not generally cited. Journals
published in non-English languages or using non-Roman
alphabets may be less accessible to researchers worldwide,
which can influence their citation patterns. This should be taken
into account in any comparative journal citation analysis.
Thanks!
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