Human sensorium is extremely flexible. The experiment I'm thinking of used subtle vibrating motors on a belt to indicate north, and people performed exactly as

Human sensorium is extremely flexible. The experiment I'm thinking of used subtle vibrating motors on a belt to indicate north, and people performed exactly as though they had suddenly acquired absolute directional sense with no awareness of the vibrations after a little acclimatization. The other classic is "reverse vision" glasses that flip everything upside down. Takes about 2-6 weeks to rewire your brain, then everything appears normal... until you take them off.