18 · Posted by Matt Anderson ·

Teachers: what Turnitin AI score do you actually investigate?

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Genuinely curious what score other educators use as their cutoff for further investigation. I have been using 40% as my threshold but wondering if that is too high or too low.

Context: I teach college freshman composition. About 180 students per semester across 6 sections.

At 40% threshold I flagged maybe 12 students last semester. 8 admitted to AI use. 4 maintained they wrote it themselves (and I believe 2 of them based on their writing portfolios).

Is there a best practice here or are we all just guessing?

7 replies

7 Replies

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I've been using Copyleaks for about 3 months now and the results have definitely gotten worse recently. I think the detectors are catching up faster than the humanizers can adapt.

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good to know, thanks

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I switched from GPTZero to Originality AI last month and the difference is significant. Originality AI handles longer texts much better and the output reads more naturally imo.

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thanks for sharing!

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this is exactly what I needed

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My professor uses Turnitin and I've been self-checking my work before submitting. The scores are pretty inconsistent though, sometimes it flags perfectly human text at 30%+ which is frustrating.

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My professor uses Originality AI and I've been self-checking my work before submitting. The scores are pretty inconsistent though, sometimes it flags perfectly human text at 30%+ which is frustrating.