 Balse, waxaa jiro bulshooyiin qaba fikrad si weyn u diidan arrintan dhiigga caadada ah, sida ay sheegtay Daniela Tonelli Manica, oo ah dhaqtar cilmu-nafsi oo ka tirsan jaamacadda Unicamp ee Brazil, taas oo 20 sano cilmi baaris ku sameyneysay arrintan. 