AI advice made people three times less accurate but twice as confident, researchers found

https://media.thenextweb.com/2026/07/ai-advice-suppresses-critical-thinking-wrong-answers-study.avif

TL;DR

Researchers found AI advice suppressed judgment suspension from 44% to 3%, accuracy from 27% to 9%, while confidence rose from 30% to 76%. People trusted wrong AI answers.

Researchers from three French and Italian universities found that access to AI advice collapsed people’s willingness to say “I don’t know” from 44% to 3%. Accuracy dropped from 27% to 9%. Confidence, meanwhile, rose from 30% to 76%. “People became much worse, the accuracy was only one third, but they were twice as confident,” said Valerio Capraro, associate professor at the University of Milano-Bicocca.

The study,authored by Capraro with Chiara Marcoccia of École Normale Supérieure and Walter Quattrociocchi of Sapienza University of Rome, deliberately used questions where AI models typically fail: visual details from films, such as the colour of a team’s uniform in Bend It Like Beckham. The researchers used Step 3.5 Flash, a model that was...

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