👶
One-year crisis (10–18 months)
Throws things, head-banging, clings to parent, first 'no'. Cause: discovery of self as a separate person.
🧒
Two-year crisis (18 months – 2.5 years)
'Me do it!', rigid rituals, disproportionate reactions, aggression when frustrated. Cause: will exists but self-control does not yet.
💥
Three-year crisis (2.5–4 years)
The Seven Stars: negativism, stubbornness, despotism, wilfulness, capriciousness, independence, devaluation. Cause: the first identity crisis.
📚
Seven-year crisis (5.5–8 years)
Arrogance, manipulation, inner life, importance of peers. Cause: transition to school-age thinking.