Fact · Voice and AI
20percent
Turnitin says that in documents where its AI writing detector finds less than 20% AI writing, there is a higher incidence of false positives.
Checked against its source on October 17, 2026
In the source's own words
“in cases where we detect less than 20% of AI writing in a document, there is a higher incidence of false positives”
AI writing detection update from Turnitin's Chief Product Officer, Annie Chechitelli, Turnitin, 2023, Blog post, 23 May 2023.
Open the original- What it measures
- In May 2023 Turnitin added an asterisk to AI scores below 20 percent to show they are less reliable. The company said the cause was still under test.
- What it does not show
- The company does not give a false positive rate for this range. The statement describes the detector in 2023, not the current version.