Researchers from Stanford University have developed a brain-computer interface (BCI) that can decode users’ “inner speech” and convert it into words. The device successfully allowed four paralyzed patients to communicate and represents a massive breakthrough in this field, although its ability to tap into people’s thoughts raises a number of concerns about mind-reading and data privacy. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Previously, BCIs have been used to enable speech by monitoring neural activity in the brain’s motor cortex as users physically attempt to talk - even if they can’t actually do so. Yet this constant effort can be tiring, which is why the researchers set out to create a system capable of turning imagined s

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