Stealing Fire: How Silicon Valley, the Navy SEALs, and Maverick Scientists Are Revolutionizing the Way We Live and Work

by Steven Kotler

by upgrading the tone to include a visual display, and adding in an EEG layer—so there’s neurofeedback to go along with the biofeedback—he can get whole groups of people to synchronize their heart rates and brainwaves and drive them into group flow.