A main source for the ages
How and when infants learn to climb stairs
Sarah E. Berger, Carolin Theuring, Karen E. Adolph · 2006 · Infant Behavior and Development
- Children
- About 730 families
- Where
- Not given in the summary we read
- Ages
- About 8 to 15 months
- How
- Parents' reports
- What it found
- Babies first went up stairs on their own at about 11 months on average, nearly always by crawling, and came down at about 12½ months, usually backwards.
- Limits
- We have only read the summary. These are averages, with no spread of ages.