This Guide will provide you with information about bibliometric indicators of research impact and tools that you can use to access these indicators.
Citations to publications are the most common indicators of impact. You can find citation counts to research articles on websites such as Google Scholar or databases such as Web of Science or Scopus. These counts are collected at the level of an individual publication (article-level indicators) and can be "rolled up" to include all publications by an individual author, research group, institution or country. H-Index is an example of an indicator derived from calculating citation counts to a group of publications (traditionally, of an individual author, but also research groups or entire institutions). Indicators constructed using aggregate citation counts to groups of publications can be also used to measure impact of journal titles (Thomson Reuters' Journal Impact Factor (JIF) is one such example).
While citation counts have been used for some time to assess impact of research, new modes of scholarly communication enabled by new technologies allow now for capturing a greater variety of impacts. Indicators based on measuring and benchmarking usage of scholarly content outside journal article are know collectively as alternative metrics or altmetrics. These metrics have potential to show impact of a broader range of research outputs (citations are usually counted for journal articles) and impact outside the research community.
Follow the links below to learn more about indicators of research impact.