A classic study on this
Infants’ reasoning about hidden objects: evidence for event‐general and event‐specific expectations
Renée Baillargeon · 2004 · Developmental Science
- Children
- Many studies, mostly small
- Where
- Mostly North America
- Ages
- About 2½ to 12 months
- How
- A review that brings together many looking studies
- What it found
- Some looking studies found signs of this from about 2½ months. What babies notice grows bit by bit through the first year, for different kinds of events.
- Limits
- Most of the studies reviewed come from the author's own research group.