So Robert Provine, who has done a lot of work on this, has pointed out that you are 30 times  more likely to laugh if you are with somebody else than if you're on your own, and where you find most laughter is in social interactions like conversation.
Robert Provine telah meneliti ini secara ekstensif, dan menurutnya ada 30 lebih banyak kemungkinan Anda tertawa ketika sedang bersama orang lain, daripada ketika sendirian, dan kebanyakan tawa terjadi di dalam interaksi sosial semacam percakapan.