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Lecture

PLecture1.rtf

35 Pages
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Department
Psychology
Course Code
PSY1102
Professor
Najwa Haddad

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January 11th 2010613 6207488Chapter 4 Nature NurterHuman DiversityI Intro What makes us who we areare we guided by our genes our environment Nature or Nurturenature anything genetic DNA heredity genesnurtureexperienceenvironment everything else that isnt genetic country culture religion dietboth are equally important in shaping who we are there is an interaction between the two they will effect and influence eachotherex certain genes may not get to be expressed because of the environment growth stunted children in Tanzaniabehaviour genetics study of relative power and limits of genetic and environmental influences on behaviourII Nature ComponentA Genes biological blueprint every cell has 46 chromosomes23 pairs carry genetic info in the form of DNAgenes basic biochem unit of heredity that make up chromosomes segment of DNA that can make proteins carry the instructions that give a characteristic singlegene complexes group of genes that come together to create a behaviourgenes are made up of nucleotides AGCT biochemical building blocks sequence determines what a genes doeschromosomes books genes words nucleotides lettersgeneticits and psychologist are interested in the occasional variations found at some gene sites in human DNAtraits are influenced by our genes interacting with our environmentHuman Genome complete instructions for making an organism consisting of all the genetic material in that organisms chromosomes30 000 genes9999 genetically similar genetic profile that makes us humans001 difference5 represents races95 represents differences within a racerace is a social concept biologically meaninglessB Evolutionary Psychology pg 143definition take the ideas of the theory of evolution and use them to explain human behaviours and traits Darwin study of evolution of behaviour and the mind using principles of natural selectionnewset perspective in psychmain goal survive and reproduce transmit genesnatural selection survival of the fittest fitcharacteristics of the organism meet the demands of the environment inherited traits that lead to increased reproduction and survival will most likely be passed on to succeeding generationsuniversaladaptive adapt to environment we dont have wings we built airplanesBehaviour genecists explore the genetic and environmental roots of human differences Evolutionary psychologists focus on what makes us so much alike as humans using natural selection to understand the roots of behavuour and mental processesex preference for sweets over bitter things because ancestors preferred them sweet things gave them energy bitter things might have been posionousB 2 Application sexualityExample ClarkHatfieldSurvey women prefer relational sex men prefer recreationalWhen asked by average looking people to go to bed women repeatedly refused while most men were willing without even knowing thier nameWomen have the same goal but different strategy according to evolutionary psych would prefer relational beacuse it is hard to make so many with a partner the child is more probable to surviveThe more men sleep around the more they make babies so they will prefer recreational according to evolutionary psychDifferences According to EPdifferences in attitudes extends to differences in behaviour studiesmen have a lower threshold for perceiving warm responses as a sexual comeon Men attribute a womans friendliness to sexual interest helps explain mens greater sexual assertivenessbehavioural and biological similarities arise from our shared genomewhat women and men find attractive varies with time and placemen youthful appearance healthy fertileappearing women smooth skin youthful shape suggesting childbearing years to come wider hips fertility at ages associated with peak fertilitywomen maturity dominance boldness affluent potential for long term mating capacity to support and protectNature selects behaviours that increase the likelihood of sending ones genes to the futre Social expectations shape gender differences and in mate preferencesGender equality brings smaller gender differenes in mate preferencesSsexes having faced similar adaptive problems are far more alike than differentGender and Risk TakingB 3 Critique of Evolutionary psych from the book on midtermIf men were uniformily loyal to their mates might we not reason that the children of these committed supportive fathers would more often survive that to perpetuate their genes Might not men also be better off bonded to one woman both to increase their odds of impregnation and keep her from advances of other menMight not a ritualized bond a marriage also speare women from chronic male harassment
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