Do Men Yawn More Than Women?
نویسندگان
چکیده
In all the species of nonhuman primates for which data on sex differences in the frequency of yawning are reported, males yawn much more than females (Bertrand 1969; Deputte 1978; Goy and Resko 1972; Hadidian 1980; HA and DeVore 1965; Redican 1975; Rinaldi 1985; Wolfheim and Rowell 1972). This différence has been related to sexual dimorphism in canine size: The larger size of male canines may make the male yawn a more effective threat.
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تاریخ انتشار 2002