>> In order to make development a little easier to study,
we divide it into different periods as well as domains
but let's talk about the periods here.
So, the first period is prenatal development and that is
between conception and birth and this is when the human goes
from being one cells to trillions of cells and all
of the body systems develop
and many things can influence that development.
Then the next 2 years are infancy and toddlerhood.
Again, dramatic growth and change.
The child is born completely helpless and by the time
that this time period is done, they are toddling and talking
and able to meet some of their self-help needs.
Then we move into early childhood also known
as the preschool years and this is where the child starts to get
into the larger world, makes more friends,
their kind of world expands beyond the family and a lot
of things become more refined.
Then we move into middle childhood
or the school age years and often what we talk
about during these years is connected
to their school experience.
So, things like sports and their academic performance
and just those types of things and then we finish up by looking
at adolescents where you know that's kind of marked
at the beginning by puberty and kind of marked at the end
by adulthood, although those ages kind of vary.
So, it was hard to pick specific times,
but some really important things happened during these years
that can have a lifelong impact on children.