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Article Impact Index
The Article Impact Index (AII) is an indicator used at Iscte-Instituto Universitário de Lisboa to measure the impact of an article in the context of the Impact Factor of the journal in which the article is published. The AII is calculated as the ratio between the citations that the article has received up to this point and the total sum of the journal's impact factors from the year of publication up to the year before the current one (i.e. 2025). In case there is no data regarding the Impact Factor of the previous to the current one, we consider the same value of the Impact Factor of the year previous to the one missing.
It is only possible to calculate the AII for articles in indexed journals published up to the year before the current one (i.e. 2025). And for those cases, it is also necessary that the Impact Factor values exist for all the years between the publication year and the year before the current one (i.e. 2025).
Let us check this publication example:
| Title | Income protection for vulnerable groups during the pandemic in Brazil and Chile: The relevance of policy trajectories and governance arrangements | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Year | 2025 | |||||||||
| Web of Science® | Scopus (Scimago) | |||||||||
| Citations | 1 | 1 | ||||||||
| Sum of Impact Factors |
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| AII Calculation |
1 / 0.7 = 1.4
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1 / 0.8 = 1.2
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| Article Impact Index | 1.4 | 1.2 | ||||||||
