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Lecture 7

Lecture 7- March 5.rtf

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Department
Psychology
Course
PSY100H1
Professor
Alison Luby
Semester
Winter

Description
PSY100 Lecture 7 March 5Part 1 DEVELOPMENTA The Developing Body Progression is predictable A genetic component But culture can also play a role ConceptionPrenatal period prior to birthZygote fertilized egg starts dividing doubles forms a BLASTOCYST that keeps growing as cells continue to divide for the first 15 weeks or so after fertilization 2nd8th week Embryo limbs take shape cells start to specialize2nd monthbirth Fetus development after all major organs are established physical maturation is the primary changeBrainHuge neuron development between 19th day after fertilization and end of 7th month Basic brain cells week 4Cortex cells week 7Thalamushypothalamus week 10Leftright hemispheres week 12Myelination occurs Brain development continues into old age Myelinated axons form synapses with more neurons than infant brain will use Synaptic pruning occurs process where the frequently used synaptic connections are preserved those that arent are lost Prenatal RisksEmbryonic stage is a CRITICAL PERIOD The embryo is especially susceptible to TERATOGENS any agent that causes a birth defect because it cannot be filtered out by the placentaDrugs radiation virusesbacteria alcohol FETAL ALCOHOL SYNDROMETeratogens can affect size behaviour intelligencereasoning health language organs limbs NewbornsInfants are born with an immature visual system 20300Acuity is at about 2030 cmCan detect movement and large objectsEspecially love faces and eyesExperience size constancy Do not have depth perceptionLearns with experience and making connections with monocular cues Other senses function from day 1 but still require development Orient to sounds especially loud sounds and human speech First week recognize mothers smell like food that mother ate while pregnant preference for novel stimuli gaze longer at facelike pattern than non facelike pattern First few weeks infants have REFLEXES involuntary unlearned motor behaviours which go away when the infants have more control over their motor skills ReflexesRooting turning head and opening mouth in direction of touch on cheekSuckingGrasping B Cognitive Development PiagetChildren also develop increasing sophistication in cognitive processes like thinking remembering and information processingThese stages are universal and all children go through them in a set order each stage is qualitatively different from the others Development of SchemasChildren are active learners in their environments Assimilation taking new info and fitting it into an alreadyexisting schema
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