Journal metrics

• Comparing journals within the same research area.
• Publications indexed in Web of Science (Note: not all journals in Web of Science have an Impact Factor).

• Demonstrating impact over time for journals in disciplines with slower citation turnaround time.
• Journals indexed in Web of Science (Note: not all journals in Web of Science have an Impact Factor).

The average Category Normalized Citation Impact (CNCI) of citable items (articles and reviews) published by a journal over a recent three-year period.

A JCI above 1.0 means that the journal performs better than average, with 2.0 indicating the journal performs twice as well as average.

• JCI is normalized for subject field so it can be used for comparison between fields of research with different publication and citation practices.
• Journals indexed in Web of Science (All Web of Science Core Collection journals are eligible for the JCI).

The ratio of a journal’s average citation count per paper in the current year from articles, reviews and conference papers published in the previous 3 years and the citation potential of its subject area.

The impact of a single citation is given higher value in subject areas where citations are less likely and vice versa.

• SNIP is normalized for subject field so it can be used for comparison between fields of research with different publication and citation practices.
• Journals indexed in Scopus.

Calculated by dividing the number of citations to papers published the current year by the number of papers published in that year.

The Immediacy Index indicates how quickly articles in a journal are cited by measuring the average number of times an article is cited the year it is published.

• Comparing journals within the same research area, as citation rates vary between disciplines.
• Comparing journals in topic-areas with high urgency or cutting-edge research, where it is important to get the research out as quickly as possible.
• Journals indexed in Web of Science.

• Comparing journals within the same research area.
• Journals indexed in Scopus.

Based on weighted citations in a specific year to papers published in the previous 3 years.

SJR accounts for both the number of citations received by a journal and the importance or prestige of the journals where the citations come from.

• SJR is normalised for subject field so it can be used for cross-comparison between fields of research with different publication and citation practices.
• Journals indexed in Scopus.

Calculated by citations received in the year from publications in the previous 5 years.

Eigenfactor Score rates the total importance of a journal by counting the number of incoming citations to a journal, AND by considering the significance of these citations.

Citations coming from a higher-ranked journal make a larger contribution to the Eigenfactor than from lower-ranked journals.

• Established researchers with publications indexed in Web of Science.
• Researchers who have published in prestigious journals.
• The Eigenfactor Score is normalised for subject field so it can be used for cross-comparison between fields of research with different publication and citation practices.