Robotic Nation Evidence

The article describes a hat that detects brain signals from scalp sensors (rather than implanted electrodes). Those signals are then used to control devices:

Thinking hat for directing movements in robot

From the article: "The technology detects brain waves by using electrodes placed at strategic points on the scalp. They are positioned over brain areas, known to be involved in moving specific body parts. The computer can then distinguish between signals corresponding to different types of movement.

Previously, accurate detection of local brain activity has required electrodes to be implanted in the brain. This technique has allowed recipients to control robots and even send e-mails."