Can High Tech Machines Read Your Mind?

I had mounted a decorative rock onto a radio-controlled toy car’s chassis and connected the car’s motor to a wireless interface, that was in turn under the control of my brain. The experimental toy I was developing, called Rocky: The Rock That Rolls, did move forward and stop under mind control via electrodes on my scalp—more or less reliably—but I could never get it to turn in the right direction consistently, or to go in reverse. [keep reading]