1. Developmental Psychology
Biosocial Development in Infancy

2. Average Physical Growth
Average infant birth weight is lbs.
Typical 2 year old is of adult weight
Average infant length is in.
Typical 2 year old is in tall.

3. Brain Development Newborns brain is approximately % of adult weight
By 2 years, this has increased to %
Increases / changes in physical structure of the brain occure
Neurons, axons, dendrites, cortex
Synaptic gap ( ),

4. Brain Development Newborns Neural pruning Newborn has
Dendrites increase in number
Brain weight in the first 2 years
Neural pruning
Unused neurons / misconnected dendrites are killed off

5. Brain Development Prefrontal Cortex Involved in
Causes rupturing of blood vessels in the brain and breaks neural connections

6. Early Experience and The Brain
Examples of experience expectant brain functions?
Examples of experience dependant brain functions?