E. Garfield's Two Concepts of Citations Explained

Eugene Garfield, a prominent figure in the fields of bibliometrics and citation analysis, proposed distinct concepts regarding the nature and use of citations in academic literature. His work laid the foundation for understanding how citations function within the scientific community and how they can be used as metrics.

According to E. Garfield, the two fundamental concepts associated with 'citations' are:

• Classic citations: This concept refers to the traditional role of a citation, which is to acknowledge the intellectual heritage and the foundational work upon which new research is built. It signifies recognition of prior scholarly contributions and establishes the context for the current study.

• Impact Factor: Developed by Garfield himself, the Impact Factor (specifically the Journal Impact Factor) is a metric designed to assess the relative importance or prestige of a scientific journal within its field. It is calculated based on the average number of citations received by articles published in that journal over a specific period, typically two years.

The distinction between 'Classic' citations and the 'Impact Factor' highlights the dual nature of citations: serving as markers of intellectual lineage and influence for individual works, and as quantitative measures for evaluating the perceived importance of journals.