Mark Jackson is playing a computer game with his mind. As he reclines in bed, three blue circles appear on a laptop screen a few feet away. One turns red: the target. Jackson is in control of a white ...

The startup specializes in "non-invasive" "mind-reading" tech—a kind of neural data collection that, its CEO hopes, will have all sorts of consumer applications.

A brain implant can decode a person’s internal chatter — but the device works only if the user thinks of a preset password 1. The mind-reading device, or brain–computer interface (BCI), accurately ...