Sage has retracted 678 more papers from the Journal of Intelligent and Fuzzy Systems (JIFS), concluding an investigation that has now purged 1,561 articles — the most ever removed from a single journal. The publisher, which acquired JIFS from IOS Press in November 2023, began investigating the journal in early 2024 after discovering “indicators that raised concerns about the authenticity of the research and the peer review process.”
This final batch follows 467 articles retracted in August and another 416 in January. Problems in the retracted papers included citation manipulation, “tortured phrases,” unauthorized third-party involvement in submissions, and evidence suggesting collusion between authors and reviewers. Most authors were from India and China, with some from Pakistan, Turkey, Iran, and Iraq. Cengiz Kahraman of Istanbul Technical University, who authored 20 of the retracted papers, disputed the decision, telling Retraction Watch that Sage acted “without any reason and evidence.” The journal has now resumed publishing.
