Vaikutusosuuttaa

Vaikutusosuuttaa, also known as the impact factor, is a metric used to evaluate the relative importance of a journal within its field. It is calculated by dividing the number of citations in a particular year to the "citable items" published in the journal during the previous two years. The citable items typically include articles, reviews, and proceedings papers, but they do not include items such as news items, book reviews, and editorials.

The impact factor is widely used by universities and research institutions to evaluate the quality and influence of a journal. It is also used by funding agencies to determine the merit of research proposals. However, it is important to note that the impact factor has its limitations. It does not account for the quality of the citations, the subject field of the citations, or the age of the citations. Additionally, it is not a perfect measure of the influence of a journal, as it can be influenced by factors such as the size of the journal's readership and the frequency of publication.

Despite its limitations, the impact factor remains a widely used metric in the evaluation of academic journals. It provides a useful tool for researchers, institutions, and funding agencies to assess the relative importance and influence of a journal within its field. However, it should be used in conjunction with other metrics and qualitative assessments to provide a more comprehensive evaluation of a journal's quality and impact.