birth-2 months
normal autism
2-5 months
symbiosis
5-10 months
differentiation
10-18 months
practicing
18-24 months
rapproachment
2-5 years
object constancy
sleep periods predominant; normal autism
birth-2 mos
mother-infant fused
2-5 months
distinctness from mother is appreciated; differentiation
5-10 months
moving autonomously, exploring outside world
10-18 months - PRACTICING
rapproachment
18-24 months
object constancy
2-5 yrs