At a glance
Some sleep longer stretches by 6–9 months; many still wake for feeds or comfort — biologically normal. Often peaks 8–10 months as attachment to primary caregivers solidifies — not shyness to "fix".
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| Measure | Infant | Newborn | You want |
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Reading checklist
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Infant · The infant year spans rapid motor, cognitive, and social growth
The infant year spans rapid motor, cognitive, and social growth from dependent newborn to mobile, communicative near-toddler. Piaget's sensorimotor stage and later attachment research frame this period as active learning through movement, mouth, and reliable caregivers.
Infant · When can infants sleep through the night?
Some sleep longer stretches by 6–9 months; many still wake for feeds or comfort — biologically normal. Often peaks 8–10 months as attachment to primary caregivers solidifies — not shyness to "fix".
Infant · Infanthood became a distinct developmental stage as child psycho
Infanthood became a distinct developmental stage as child psychology separated from generic "childhood" in the twentieth century. Modern infant care integrates developmental milestones as guides — not deadlines — with safety regulation on sleep and nutrition.
Infant · Attachment revolution
Bowlby-Ainsworth work and Spock's trust-your-instincts message reshaped middle-class infant care. Jean Piaget's sensorimotor observations and Mary Ainsworth's Strange Situation (1978) defined infant cognition and attachment as measurable science.
This is education from the atlas. It does not diagnose and does not prescribe a dose. It does not replace the full topic page.
What is the next question after this?
Infanthood became a distinct developmental stage as child psychology separated from generic "childhood" in the twentieth century. Modern infant care integrates developmental milestones as guides — not deadlines — with safety regulation on sleep and nutrition.
Does this page rank people or nations?
This is education from the atlas. It does not diagnose and does not prescribe a dose. It does not replace the full topic page.
Where is the longer entry?
Bowlby-Ainsworth work and Spock's trust-your-instincts message reshaped middle-class infant care. Jean Piaget's sensorimotor observations and Mary Ainsworth's Strange Situation (1978) defined infant cognition and attachment as measurable science.