Development depends on maturation and learning

Development occurs in random patterns

Development is identical in all children

Development proceeds from complex to simple

Infancy

Late childhood

Early childhood

Middle childhood

Child’s ordinal position in the family

Exposure to radiation during pregnancy

Emotional state of the child

Socio-economic status

Progressive increase in skills

Increase in emotional maturity

Increase in physical size of the body or any part

Improvement in language development

Horizontal to vertical

Cephalocaudal and proximodistal

Proximodistal to cephalocaudal

Distal to proximal