Testing the AI detectors
Robin Crockett (Academic Integrity Lead – University of Northampton) has run a small scale study investigating two AI detectors with a range of AI created assignments and has shared some of the initial results.
He used ChatGPT to generate 25 nominal 1000-word essays: five subjects, five different versions of each subject. For each subject, he instructed ChatGPT to vary the sentence length as follows: ‘default’ (i.e. I didn’t give it an instruction re. sentence length), ‘use long sentences’, ‘use short sentences’, ‘use complex sentences’, ‘use simple sentences’.
The table below shows the amount of the assignment which was detected as using AI in two different products: Turnitin and Copyleaks
Essay 1 | Essay 2 | Essay 3 | Essay 4 | Essay 5 | |
Turnitin | |||||
Default | 100% AI | 100% AI | 76% AI | 100% AI | 64% AI |
Long | 0% AI | 26% AI | 59% AI | 67% AI | 51% AI |
Short | 0% AI | X | 31% AI | 82% AI | 27% AI |
Complex | 33% AI | 15% AI | 0% AI | 63% AI | 0% AI |
Simple | 100% AI | 0% AI | 100% AI | 100% AI | 71% AI |
Copyleaks | |||||
Default | 100% AI at p=80.6% | 100% AI at p=83.5% | 100% AI at p=88.5% | 100% AI at p=81.3% | 100% AI at p=85.4% |
Long | ~80% AI at p=65-75% | 100% AI at p=81.5% | ~95% AI at p=75-85% | 100% AI at p=79.1% | 100% AI at p=80.6% |
Short | ~70% AI at p=66-72% | 100% AI at p=76.9% | 100% AI at p=87.3% | ~85% AI at p=77-79% | 100% AI at p=78.4% |
Complex | 100% AI at p=72.9% | 100% AI at p=81.0% | ~90% AI at p=62-73% | 100% AI at p=77.7% | 0% AI |
Simple | 100% AI at p=83.6% | ~90% AI at p=73-81% | 100% AI at p=95.2% | ~90% AI at p=76-82% | 100% AI at p=84.9% |
X = “Unavailable as submission failed to meet requirements”.
0% -> complete false negative.
Robin noted:
Turnitin highlights/returns a percentage of ‘qualifying’ text that it sees as AI-generated, but no probability of AI-ness.
Copyleaks highlights sections of text it sees as AI-generated, each section tagged with the probability of AI-ness, but doesn’t state the overall proportion of the text it sees as AI-generated (hence his estimates).
Additional reading: Jisc blog on AI detection
Recent Posts
- Blackboard Upgrade – October 2024
- Small Changes, Big Impact: Fix Your Content Day
- “I can use the tools available to me to create online video tutorials for students”
- Stress-Free Submissions: How Practice Can Transform Digital Assessments
- AI Conversation: New feature September 2024
- Unlocking the Power of Kaltura: My Content Analytics
- Enhance Accessibility with AI-Generated Alternative Text in Blackboard Ultra
- Blackboard Upgrade – September 2024
- Practice makes Perfect
- The New V7 Video Player on NILE
Tags
ABL Practitioner Stories Academic Skills Accessibility Active Blended Learning (ABL) ADE AI Artificial Intelligence Assessment Design Assessment Tools Blackboard Blackboard Learn Blackboard Upgrade Blended Learning Blogs CAIeRO Collaborate Collaboration Distance Learning Feedback FHES Flipped Learning iNorthampton iPad Kaltura Learner Experience MALT Mobile Newsletter NILE NILE Ultra Outside the box Panopto Presentations Quality Reflection SHED Submitting and Grading Electronically (SaGE) Turnitin Ultra Ultra Upgrade Update Updates Video Waterside XerteArchives
Site Admin