AI Chatbots Fail Dementia Tests: A Symptom of Design or a Sign of the Times?
A study in *The BMJ* assessed the cognitive abilities of leading large language models (LLMs) using the Montreal Cognitive Assessment (MoCA) test. All LLMs exhibited weaknesses in visuospatial skills and executive functions, scoring below the threshold for normal cognitive function. Older versions of the chatbots performed worse, mirroring cognitive decline in humans. These findings challenge the notion of LLMs soon replacing human doctors, suggesting instead a potential future need for clinicians to address AI-related cognitive impairments.