It’s astonishing and frightening how completely people can tune out what’s going on around them and become selectively oblivious. A while ago, the Washington Post conducted a clever and slightly wacky experiment, and had Joshua Bell, the world-famous virtuoso violinist, pose as a street musician in the Washington D.C. subway. The article is well worth reading.

What’s disturbing is how completely it confirms the adage that we see (or hear!) exactly what we expect. It takes a lot of deviation from normality to jar us out of autopilot.