So sánh phương pháp

	Phân tích trích dẫn	Mã định danh nhà nghiên cứu ORCID
Lĩnh vực	Kỹ năng nghiên cứu	Kỹ năng nghiên cứu
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1955 (citation indexes); 1975 (Impact Factor); 2005 (H-index)	2010 (founding); 2012 (launch)
Người khởi xướng	Eugene Garfield (Citation Indexes, 1955); Jorge Hirsch (H-index, 2005)	ORCID Inc., a non-profit founded in 2010 by Liz Haak and others
Loại	Tool	Standard
Công trình gốc	Hirsch, J. E. (2005). An index to quantify an individual's scientific research output. Proceedings of the National Academy of Sciences, 102(46), 16569–16572.	Haak, L. L., Fenner, M., Paglione, L., Pentz, E., & Ratner, H. (2012). ORCID: A system to uniquely identify researchers. Learn. Publ., 25(4), 259–264.
Tên gọi khác	citation metrics, bibliometric analysis, citation tracking	ORCID, researcher identifier, ORCID iD
Liên quan	4	4
Tóm tắt	Citation analysis is the systematic study of how scholarly works are cited by subsequent research, used as a proxy for research impact and influence. Founded formally by Eugene Garfield in 1955 (introducing citation indexes), the field encompasses metrics ranging from simple citation counts to sophisticated indices like the H-index (Hirsch, 2005) and field-normalized indicators. Citation analysis is used to evaluate researcher productivity, track influence of ideas, assess journal quality, and detect research trends. While citation counts are not perfect measures of quality (high citation does not equal high quality; time lag in citation accumulation), they provide valuable quantitative data for research evaluation alongside peer review and expert assessment.	ORCID (Open Researcher and Contributor ID) is a free, unique, persistent 16-digit identifier assigned to researchers that distinguishes them from others with the same or similar names. Launched in 2012 by ORCID Inc., a non-profit organization, the ORCID system addresses a critical problem in scholarly communication: name ambiguity. Millions of researchers worldwide share names (e.g., 'Smith, J.'). Without a unique identifier, citations and publications are difficult to attribute correctly, author H-indices are miscalculated, and researchers are credit for work they did not do. An ORCID iD is free, permanent, and owned by the researcher; it persists regardless of affiliation changes or career transitions.