I always thought of it as:
13-15 – early adolescence
16-17 – mid adolescence
18-20 – late adolescence
http://en.wikipedia.org/wiki/Table_of_development_periods
What do you think?
it depends on each human being. Normally it would be 13-20…
hahahha

it depends on each human being. Normally it would be 13-20…
hahahha
References :
Freud & mathematics do not mix together
I Think Its 12-17 Because 18 is grown. And 13 is when you get the "teen" in the name but 12 year olds are fast now so its different.
References :