This guide will help you determine the impact of scholarly work, journals or researcher(s). It is important to remember that this can be difficult and is somewhat subjective.
Bibliometrics: Statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use.
Citation Anaysis (Article Impact): Can help you determine how often something has been cited and who has cited whom.
Journal Rankings (Journal Impact): Can reveal a journal's influence by looking at how often a journal's articles have been cited.
h-Index (Researcher Impact): Determines the success of a particular researcher by measuring the number of works they publish and the number of times their works are cited.
Altmetrics, or “alternative metrics”: New methods for measuring the use and importance of scholarly work. Altmetrics provide article-level data and are based on new electronic sources of information, such as number of downloads and page views from a publisher, repository or online reference manager like Mendeley, or the amount of discussion generated in online venues such as Twitter or blogs.