Self-Citation Patterns of Journals Indexed in the Journal Citation Reports

• Except for a very few high-impact journals, almost all journals’ impact factor rankings change when self-citations are excluded from the calculation. Self-citations important non-English speaking academic communities. Not journals equal, and so it is quite problematic to assess them using one formula. It policymakers understand underlying problems related Self-citation patterns of 1,104 indexed in 2018 edition Journal Citation Reports were examined possibility rank manipulations. The included this study found have self-citation rate more than 25%. Our research shows that by excluding rates, with high not affected; however, other removal even single can cause significant changes. typical local language as well upper-middle-income European countries. Impact factors used performance evaluations should be carefully, particularly variables such journal size, publication language, publisher country, subject area correlate rates.