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Article-Level Metrics

Introduction

What are article-level metrics? Why track at this level?

Authors often track the sources that cite their work to see the impact of their research. Researchers also look for citing articles to trace the evolution of research and ideas. Just as examining an article's bibliography allows you to look backward at its influences, examining the sources that subsequently cite an article reveal its influence in its subject.

There are a number of sources available to researchers to discover citations, including Google Scholar and Web of Science.

Note: Citations are the traditional "article-level metric"--that is, a measure of the influence of published research at the article level. Most Altmetrics are also tracked at the article level; however, Altmetrics and article-level metrics are not quite synonymous.

What are the caveats and limitations?

  • Subjects vary significantly in their citation patterns (because of their size, because of the types of sources researchers use, and because of the number of sources articles cite on average). Just as it is inappropriate to compare impact factors among fields, it is inappropriate to discuss citation counts without reference to the field of study. "Highly cited" might mean a very different number of citations in two different fields. It is entirely normal, for example, for publications in the humanities to have lower citation counts than articles in the physical sciences.
  • Consider the age of articles when searching for citations. In many fields, articles continue to accumulate citations for years (or occasionally even decades) after they are published. Likewise, very recent articles usually cannot be expected to have received any citations yet, regardless of their quality.
  • Multiple databases track citations. None of them are guaranteed to find all citing articles, and they often duplicate one another. Users should not simply examine citation counts and add them up. Rather, lists of citing articles should be examined and duplicates removed before citation counts are reported.
    • Suppose different databases find the following for a selected article:
    • Google Scholar: 15 citations
    • Web of Science: 8 citations
    • PsycINFO: 12 citations
    • Total ≠ 35! 
    • The total number of citations is not 35: it's 35 minus the duplicates that appear in multiple databases
    • See Metrics

SciVal

SciVal, which is based on Scopus data, provides access to the research performance of 8,500 research institutions and 220 nations worldwide.  SciVal enables users to benchmark and analyse publication output at an individual, group and institutional level.

First time users of SciVal will need to create an account, unless they already have accounts for other Elsevier products, such as Scopus, ScienceDirect, ClinicalKey, or Engineering Village. For more information on how to use SciVal, contact your Liaison Librarian.

Defining a Researcher

To analyse the output of a researcher, users will firstly need to define the researcher in SciVal.  Instructions to do this are here.

You may need to update the profile of a researcher after they have been defined.  Instrucctions for how to do this are here.

The 'Overview' module has predefined time periods, which are updated annually.  To find publication metric data outside of these time periods, use the 'Benchmarking' module.  For more information on how to use the 'Benchmarking' module, contact your Liaison Librarian.

The default classification scheme used in SciVal is the All Science Journal Classification Categories (ASJC).  To change to another scheme, such as Field of Research (FoR) codes, click on the current scheme and select from the dropdown menu.

Choose a subject area filter to see the performance of an entity in that field.

 

Overview Module

This module provides an overview of an entity's publication metrics, including the field-weighted citation impact, h-index, number of publications, citations per publication. Click through the other tabs, such as 'Published' and 'Cited' to get a more detailed analysis.  All information in the 'Overview' module can be exported as a spreadsheet, and some data can be exported as a pdf or picture file.