Science: Mind-Reading Computer

The experiment looks like some ingenious test of mental telepathy. Seated inside a small isolation booth with wires trailing from the helmet on her head, the subject seems deep in concentration.

She does not speak or move. Near by, a white-coated scientist intently watches a TV screen. Suddenly, a little white dot hovering in the center of the screen comes to life. It sweeps to the top of the screen, then it reverses itself and comes back down. After a pause, it veers to the right, stops, moves to the left, momentarily speeds up and...