AI trong phát hiện đạo văn và tính liêm chính trong học thuật

Turnitin Similarity compares submitted writing with available sources and reports overlapping passages. A match may reflect a quotation, citation or another legitimate use; a similarity score does not establish plagiarism or intent. AI-writing detectors address a different question by estimating whether a text resembles examples in their classification setup. OpenAI discontinued its classifier on July 20, 2023 because of low accuracy, and documented that it was especially unreliable on texts below 1,000 characters. These limitations belong to that classifier, not a universal numeric rule for all detectors. The cited 2023 study found disproportionate false positives on non-native English writing in its evaluated samples. A false positive labels human-written text as generated. Educators can supplement submitted work with an oral explanation or process portfolio and use a consistent review process. Neither a similarity score nor a detector flag should trigger a misconduct finding without contextual evidence and applicable policy.