Microsoft reported the same findings earlier this year, spooky to see a more academic institution report the same results.
https://www.microsoft.com/en-us/research/wp-content/uploads/2025/01/lee_2025_ai_critical_thinking_survey.pdf
Abstract for those too lazy to read

The rise of Generative AI (GenAI) in knowledge workflows raises
questions about its impact on critical thinking skills and practices.
We survey 319 knowledge workers to investigate 1) when and
how they perceive the enaction of critical thinking when using
GenAI, and 2) when and why GenAI affects their effort to do so.
Participants shared 936 first-hand examples of using GenAI in work
tasks. Quantitatively, when considering both task- and user-specific
factors, a user’s task-specific self-confidence and confidence in
GenAI are predictive of whether critical thinking is enacted and
the effort of doing so in GenAI-assisted tasks. Specifically, higher
confidence in GenAI is associated with less critical thinking, while
higher self-confidence is associated with more critical thinking.
Qualitatively, GenAI shifts the nature of critical thinking toward
information verification, response integration, and task stewardship.
Our insights reveal new design challenges and opportunities for
developing GenAI tools for knowledge work.