Why Canned Humor Works on Us?

Research shows that canned merriment makes an audience laugh longer and more often when humorous material is presented. In addition, some evidence indicates that canned laughter is most effective for poor jokes. But why should we laugh more at comedy material afloat in a sea of mechanically fabricated merriment? And why should we think that comic flotsam funnier? The executives aren't really fooling us; any one can recognize dubbed laughter. It is so blatant, so clearly counterfeit, that there could be no confusing it with the real thing. Yet transparent forgery that it is, it works on us.