chapter -4 Behavioural Genetics

Therearelimitednumberofbasicdimensionstohumanpersonali

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Unformatted text preview: likelihoodofsurvivalandreproductionwillbemorelikely tobepreservedinthepopulation - Thereisafilterthatincreasesthenumberofcharacteristicspresentinthesurvivorsand decreasethecharacteristicsfoundinnonsurvivors - Someneutralvariationsarepassedonwithoutbiasandareknownas evolutionarynoise anditcouldbeimportantinthefuture Eg.Radiationtoleranceafternuclearwar Adaptations - Theyalloworganismstomeetrecurringenvironmentalchallengestotheirsurvival - Itisimportantforananimaltopassonitsgenes,whichexplainswhyanimalssometimes risktheirownsafetytoprotecttheirkin - Biology ­>behavioralcapabilities ­>survivability - Dwindlingvegetationfavoredthosewithbipedallocomotiontosurvivebecausetheycan huntonplains,thisalsofavorsuseoftools,thedevelopmentoflanguage,andsocial structure - Thegreatestpressurecametoabilitiesforattention,memory,language,andthought becausetheybecameessentialforsurvival - Today,ourbrainisactuallysmallerthanthoseoftheNeanderthalwhichshowsthat culturalevolutionisalsoimportantinthedevelopmentofadaptations Psych 1000 My Notes Page 24 culturalevolutionisalsoimportantinthedevelopmentofadaptations - Domainspecificadaptationsaredesignedtosolveaparticularproblemsuchasselecting asuitablemate,choosingsafefoodstoeat,etc - Thebrainisacollectionofspecializedandsomewhatindependentmodules AnEvolutionarySnapshotofhumannature - Infantsarebornwithinnateabilitytolearnanylanguagespoken,deafinfantsareableto learnsignlanguage - Theyareabletoperceivecertainspecificstimuli Theyaremoreresponsivetopicturesofhumanfacesthanrandomfeatures arrangedamess Theycandistinguishtheodoroftheirmother'smilk - At1weekofage,infantsshowprimitivemathskills - Humanshaveaneedtobelongandfearofbeingostracizedfromthegroup - Somebasicemotionsareuniversalizedsuchashappinessandgoodwill EvolutionaryPsychology - Aperspectivewhereallbehaviorislinkedtohowthosefunctionscontributetothe successandadaptabilityoftheindividual Personality - EvolutionaryPersonalityTheory askswheredidhumantraitscomefrominthefirstplace - Therearelimitednumberofbasicdimensionstohumanpersonality Thisisconsistentthroughoutallculturesoftheworldbecausetheyhelp...
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