I hope they also sent the participants through new mazes after training while asking them not to echolocate -- just to help determine that they weren't getting better at sightless maze walking for some other reason (like greater sensitivity to signals from the skin and hair) ... It's kind of amazing what information our bodies perceive -- I'm thinking about the phenomenon of walking down the street talking to someone next to you while not looking ahead only to suddenly realize that you've stopped and leaned dramatically backward with your head inches from a sign you didn't see ...

I'd love to learn this echolocation skill and then volunteer to help train blind folks that haven't been taught ... I'm obsessed with echolocation.