# Article Influence Score

The *Article Influence Score* determines the average influence of a
journal's articles over the first five years after publication. It is
calculated by multiplying the *Eigenfactor* Score by 0.01 and dividing
by the number of articles in the journal, normalized as a fraction of all
articles in all publications. This measure is roughly analogous to the
*5-Year Journal Impact Factor* in that it is a ratio of a journal’s
citation influence to the size of the journal’s article contribution over a
period of five years.

The equation is as follows: where **X =
***5-year Journal Article Count divided by the 5-year Article Count
from All Journals.*

The mean *Article Influence Score* for each article is 1.00. A score
greater than 1.00 indicates that each article in the journal has above-average
influence. A score less than 1.00 indicates that each article in the journal has
below-average influence.