Ma'auni na cephalic ma'auni ne na ƙididdigewa da ake amfani da shi a cikin ilimin halin ɗan adam da ilimin halin ɗan adam don kwatanta siffar dangi ko rabon kwanyar. Ana ƙididdige shi ta hanyar rarraba mafi girman faɗin kwanyar (wanda aka auna a cikin mafi girman sashi, yawanci sama da kunnuwa) ta matsakaicin tsayin kwanyar (wanda aka auna daga glabella, tsakiyar tsakiya tsakanin gira, zuwa mafi girman matsayi a baya. na kai), da kuma ninkawa da 100. Ana nuna ƙimar da aka samu a matsayin kashi.Ana amfani da ma'anar cephalic don rarraba yawan jama'a zuwa kabilanci ko kabilanci daban-daban bisa siffar kwanyar. Ana amfani da shi sau da yawa a cikin nazarin ɗan adam da bincike don nazarin bambancin ɗan adam, tsarin ƙaura, da juyin halitta. Kwankwan kai tare da ma'anar cephalic da ke ƙasa 75 an rarraba su a matsayin dolichocephalic (dogon kai), waɗanda ke da ma'auni tsakanin 75 zuwa 80 ana rarraba su azaman mesocephalic (madaidaicin kai), kuma waɗanda ke da alamar sama da 80 an rarraba su a matsayin brachycephalic (gajeren kai). ). Duk da haka, yana da mahimmanci a lura cewa an yi suka sosai kan ma’anar cephalic index kuma ana ɗaukarsa hanya ce mai kawo cece-kuce ta rarraba yawan jama’a, kamar yadda aka yi amfani da shi a baya don tallafa wa ra’ayoyin wariya game da kabilanci da hankali, waɗanda a yanzu ake ganin ba su da tushe a kimiyyance. /p>