Bibliometrics
“The quantitative measures used to assess research output i.e. publication and citation data analysis” (MyRI).
Citation Impact
The impact of a particular work may be assessed by the number of times it is cited by other works and alternative metrics such as downloads and social media buzz.
Researcher Impact
A researcher's publication impact is often assessed by the number of works they publish and the number of times their works are cited.
Journal Impact
Academic journals are assessed by the number of times their articles are cited and where they are cited.