Skip to main content

Research Guides

Reading, Writing and Publishing After You Leave U of T

Supports the course of the same name in the Graduate Professional Skills Program.

What is the H Index?

A scholar with an index of h has published h papers, each of which has been cited by others at least h times.

Tools to calculate H-Index

What is the Impact Factor?

The Impact Factor is a tool for ranking, evaluating, categorizing, and comparing journals.

The most common expression of the impact factor (IF) is in the form of the algebraic expression: C=A/B
A = the number of times articles published in two consecutive years were cited by indexed journals in the next year.
= the total number of "citable items" published by that journal in two consecutive years. ("Citable items" are usually articles, reviews, proceedings, or notes; not editorials or Letters-to-the-Editor.)
C = impact factor

 Sample calculation:
A= 2009 cites to articles published in 2007-2008
B= number of articles published in 2007-2008
C= A/B = 2009 impact factor

The most common source for impact factors is the Thomson-Reuters database Journal Impact Factors.

Watch a PowePoint presentation

PowerPoint Presentation

What is the Eigenfactor?

A journal's Eigenfactor score is a measure of the journal's total importance to the scientific community.

A journal's Article Influence score is a measure of the average influence of each of its articles over the first five years after publication. Article Influence score measures the average influence, per article, of the papers in a journal. As such, it is comparable to Thomson Scientific's widely-used Impact Factor.

More faqs

Increasing the Visibility of Your Research