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Humans may be more likely to believe disinformation generated by AI

That credibility gap, while small, is concerning given that the problem of AI-generated disinformation seems poised to grow significantly, says Giovanni Spitale, the researcher at the University of Zurich who led the study, which appeared in Science Advances today. 

“The fact that AI-generated disinformation is not only cheaper and faster, but also more effective, gives me nightmares,” he says. He believes that if the team repeated the study with the latest large language model from OpenAI, GPT-4, the difference would be even bigger, given how much more powerful GPT-4 is. 

To test our susceptibility to different types of text, the researchers chose common disinformation topics, including climate change and covid. Then they asked OpenAI’s large language model GPT-3 to generate 10 true tweets and 10 false ones, and collected a random sample of both true and false tweets from Twitter. 

Next, they recruited 697 people to complete an online quiz judging whether tweets were generated by AI or collected from Twitter, and whether they were accurate or contained disinformation. They found that participants were 3% less likely to believe human-written false tweets than AI-written ones. 

The researchers are unsure why people may be more likely to believe tweets written by AI. But the way in which GPT-3 orders information could have something to do with it, according to Spitale. 

“GPT-3’s text tends to be a bit more structured when compared to organic [human-written] text,” he says. “But it’s also condensed, so it’s easier to process.”

The generative AI boom puts powerful, accessible AI tools in the hands of everyone, including bad actors. Models like GPT-3 can generate incorrect text that appears convincing, which could be used to generate false narratives quickly and cheaply for conspiracy theorists and disinformation campaigns. The weapons to fight the problem—AI text-detection tools—are still in the early stages of development, and many are not entirely accurate. 

OpenAI is aware that its AI tools could be weaponized to produce large-scale disinformation campaigns. Although this violates its policies, it released a report in January warning that it’s “all but impossible to ensure that large language models are never used to generate disinformation.” OpenAI did not immediately respond to a request for comment.

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