手法を比較

	ジャーナルインパクトファクター	Web of Scienceデータベース
分野	計量書誌学	計量書誌学
系統	Process / pipeline	Process / pipeline
提唱年	1955	1964
提唱者	Eugene Garfield, Institute for Scientific Information (ISI)	Institute for Scientific Information (ISI), now Clarivate Analytics
種類	Metric	Database
原典	Garfield, E. (1972). Citation analysis as a tool in journal evaluation. Science, 178(4060), 471-479.	Clarivate Analytics. (2024). Web of Science Core Collection. Retrieved from https://clarivate.com/webofsciencegroup/solutions/web-of-science-core-collection/
別名	IF, JIF, Impact Factor, 2-year Impact Factor	WoS, ISI Web of Science, Clarivate Analytics
関連	5	5
概要	Journal Impact Factor (JIF) is a metric developed by Eugene Garfield in 1955 and published annually by Clarivate Analytics through Journal Citation Reports (JCR). It measures the average citation frequency of articles published in a journal over a two-year window, serving as a proxy for journal prestige and influence. A journal's Impact Factor equals the number of citations received in year Y to articles published in Y-1 and Y-2, divided by the number of citable items published in that same window. Despite widespread adoption in research evaluation, Impact Factor has significant limitations and critics argue it conflates journal prestige with article quality.	Web of Science (WoS) is the oldest and most established multidisciplinary citation database, maintained by Clarivate Analytics since 1964. It indexes over 21,000 peer-reviewed journals, conference proceedings, and books across sciences, social sciences, and humanities. WoS provides researchers, librarians, and administrators with comprehensive citation tracking, publication metrics, and research evaluation tools essential for literature review, impact assessment, and research strategy.