Experts have revealed the tell-tale signs that an essay has been written by ChatGPT and not a student.
It comes after the rise of generative AI tools, like ChatGPT, has sparked concerns about cheating among pupils in the education sector.
Repetition of words, tautology and paragraphs starting with “however” are some tell-tale features, researchers said.
The writing style of the artificial intelligence tool is “bland” and “journalistic”, according to a Cambridge University Press and Assessment study.
Researchers compared essays written by three first-year undergraduate students, with the aid of ChatGPT, with 164 essays written by IGCSE students.
These essays were marked by examiners and the undergraduates were then interviewed and their essays were analysed.
The study found essays written with the help of ChatGPT performed poorly on analysis and comparison skills compared to non-ChatGPT-assisted essays.
But ChatGPT-assisted essays performed strongly on information and reflection skills.
Researchers identified a number of key features of the ChatGPT writing style, which included the use of Latinate vocabulary, repetition of words or phrases and ideas, and pleonasms.
Researchers identified a number of key features of the ChatGPT writing style (Copyright 2022 The Associated Press. All rights reserved.)
Essays written with the help of ChatGPT were also more likely to use paragraphs starting with discourse markers like “however”, “moreover”, and “overall”, and numbered lists with items.
The researchers said ChatGPT’s default writing style “echoes the bland, clipped, and objective style that characterises much generic journalistic writing found on the internet”.
The report said: “The students found ChatGPT useful for gathering information quickly.
“However, they considered that complete reliance on this technology would produce essays of a low academic standard.”
Lead researcher Jude Brady, of Cambridge University Press and Assessment, said: “Our findings offer insights into the growing area of generative AI and assessment, which is still largely uncharted territory.
“Despite the small sample size, we are excited about these findings as they have the capacity to inform the work of teachers as well as students.”
She added: “We hope our research might help people to identify when a piece of text has been written by ChatGPT.
“For students and the wider population, learning to use and detect generative AI forms an increasingly important aspect of digital literacy.”
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