GenPsych - Ch05 Development1

GenPsych - Ch05 Development1 - Lecture Outline Brain...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture Outline Brain development. Cognitive development. Mor al development. Behavioral Genetics Behavioral genetics is concerned with the influence of genes on psychological function . Heritability : Quantifies the extent to which variations in a trait across persons can be accounted for by genetic variation. Heritability of Psychological Traits Studies of twins raised apart suggest heritability coefficients of 0.15 to 0.50 for the traits of: Conservatism. Neuroticism. Aggressiveness. Intelligence. Likelihood of divorce. Job satisfaction. Vocational interests. Each heritability quotient is calculated on the basis of the population examined. As we saw with studies of the influence of genetics on intelligence, the population studied can affect the heritability quotient. Development in the Womb Psychological deficits may occur as a result of damage during pre-natal development. Chemicals. Alcohol, heroin, cocaine, pollutants, caffeine, smoking. Viruses. Chicken pox, rubella, HIV. Radiation. Poor maternal diet. High maternal stress.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Brain Development The newborn brain has about twice as many neurons as will be needed, then cuts back. The brain is 80% of adult size by age 4. Myelination of neurons existing at birth: Fully myelinated at birth: hearing & balance. Not fully myelinated at birth: association areas of cortex. Hippocampus: Myelination continues through adulthood. Brain Development (Cont.) The frontal lobes are not fully developed until after the teenage years. Implications for working memory. New dendrites and synaptic connections between neurons develop throughout life. Recent evidence shows that the brain grows new neurons throughout life. Studying Infant Cognitive Development The habituation technique: Infants pay greater attention to novel stimuli than to familiar stimuli. Sucking reflex
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/02/2008 for the course PSYCH 101 taught by Professor Brill during the Spring '07 term at Rutgers.

Page1 / 6

GenPsych - Ch05 Development1 - Lecture Outline Brain...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online