The Family That Yawns Together Stays Together

New research shows that yawning is more contagious among family and friends than it is among strangers. Says study author Ivan Norscia, "the rate of contagion was greatest in response to kin, then friends, then acquaintances, and lastly strangers. Also the response gap (latency) — or how long it takes to a person to… » 12/13/11 6:15pm 12/13/11 6:15pm