Paris (AFP) – When Jocelyn Leitzinger had her university students write about times in their lives they had witnessed discrimination, she noticed that a woman named Sally was the victim in many of the stories.
"It was very clear that ChatGPT had decided this is a common woman's name," said Leitzinger, who teaches an undergraduate class on business and society at the University of Illinois in Chicago.
"They weren't even coming up with their own anecdotal stories about their own lives," she told AFP.
Leitzinger estimated that around half of her 180 students used ChatGPT inappropriately at some point last semester -- including when writing about the ethics of artificial intelligence (AI), which she called both "ironic" and "mind-boggling".
So she was not surprised by recent research which suggested that students who use ChatGPT to write essays engage in less critical thinking.
The preprint study, which has not been peer-reviewed, was shared widely online and clearly struck a chord with some frustrated educators.
The team of MIT researchers behind the paper have received more than 3,000 emails from teachers of all stripes since it was published online last month, lead author Nataliya Kosmyna told AFP.
- 'Soulless' AI essays -
For the small study, 54 adult students from the greater Boston area were split into three groups. One group used ChatGPT to write 20-minute essays, one used a search engine, and the final group had to make do with only their brains.
The researchers used EEG devices to measure the brain activity of the students, and two teachers marked the essays.
The ChatGPT users scored significantly worse than the brain-only group on all levels. The EEG showed that different areas of their brains connected to each other less often.
And more than 80 percent of the ChatGPT group could not quote anything from the essay they had just written, compared to around 10 percent of the other two groups.
By the third session, the ChatGPT group appeared to be mostly focused on copying and pasting.
The teachers said they could easily spot the "soulless" ChatGPT essays because they had good grammar and structure but lacked creativity, personality and insight.
However Kosmyna pushed back against media reports claiming the paper showed that using ChatGPT made people lazier or more stupid.
She pointed to the fourth session, when the brain-only group used ChatGPT to write their essay and displayed even higher levels of neural connectivity.
Kosmyna emphasised it was too early to draw conclusions from the study's small sample size but called for more research into how AI tools could be used more carefully to help learning.
Ashley Juavinett, a neuroscientist at the University of California San Diego who was not involved in the research, criticised some "offbase" headlines that wrongly extrapolated from the preprint.
"This paper does not contain enough evidence nor the methodological rigour to make any claims about the neural impact of using LLMs (large language models such as ChatGPT) on our brains," she told AFP.
- AFP
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