... —that you might be tired? I suspect that forsome of you it did, which means thatyawns can also be emotionally contagious.Simply by writing the word, I can plant afeeling in your mind. Can the ... also aurallycontagious: if you play an audiotape of ayawn to blind people, they'll yawn too.And finally, if you yawned as you readthis, did the thought cross your mind —however unconsciously ... this, I've yawned twice. If you& apos;rereading this in a public place, and you& apos;vejust yawned, chances are that a goodproportion of everyone who saw you yawn is now yawning too, and...