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Psyc21- sept 17 lec.docx

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Carly Prusky

Psyc21- Lecture: Sept.17, 2013  hormones (dopamine, serotonin, etc)  brain waves  DNA  Phys appearance (phenotypes)  Reflexes (usually dev’s at infancy)  Unconditional responses  Biological preparedness o Sleep/ wake cycles lead to how you interact with others o Infants sleep a lot to further dev social rhythms o Infants like big eyes and symmetrical faces  Longer intervals of visual fixation  Auditory preparedness also v. impt o Cat in the hat (higher sucking rates in infants who were read it while in the womb vs. not) o Preference to hear it again  Infants prefer high pitched exaggerated voices o “motherese” or baby talk  9 months, tuned to their native language  Smell, taste touch o Facilitates dev (preference of mom’s smell) o Touch dev’s v. early (most reflexes for infants)  Ie. Rooting reflex  turning towards direction someone touches their cheek  Deprivation of touch = neg consequences  Infants like face to face play o Learn adults are responsive to them o Can control their emotions and others reactions o Develop turn taking behaviours o Rules of social exchanges learned  Kids don’t like noises that are too loud o Ie. Toys that are too loud  Infant-parent dyads have difficulty o Depressed moms or drug exposes infants  Evolutionary theory  Preparedness = adaptive for survival  Infants biologically “programmed” for social development to meet needs of warmth, safety, etc  Modern evolutionary theorists o Having supports necessary is enough to reach healthy goals of social development  Don’t need to go above and beyond  Parts of the brain o Cerebrum o Cerebral cortex o Neuro bases: new born brain = ¼ of adult brain mass, by 6 months, 1/3 of adult brain weight o Visual cortex  3 months look longer at face like vs non face like stimuli o Auditory cortex  18-20 months, lang begin to develop  they’re universal listeners  infants can pick up on minute differences in sounds that adults can’t o Prefrontal cortex dev of executive processes  Allow kids to become more social (5-7 years)  Growth spurts continue until adolescence  Puberty changes social and emotional processing  Right brain vs. left brain o Control different functions o Left: lang, approach, emotions (joy, interest, anger) o Right: facial expressions, disgust, etc  People use both sides, but are usually more one than the other  Corpus Callosum  allows communication between both sides  Synapse – neurotransmitters (@ birth 2500 synapses for every neuron, age 2: 1500 synapses
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