According to Mahler's theory, the period of childhood is divided into:
According to Mahler's theory, the period of childhood is divided into three stages.

Normal autistic phase (0 - 1 year)
Normal symbiotic phase (4 wks to 4 yrs)
Separation individualization phase (5 to 36 months)
Normal autistic phase
Normal symbiotic phase
Separation industrialisation phase
All of the above