A classic study on this
Perception of Numerical Invariance in Neonates
Sue E. Antell, Daniel P. Keating · 1983 · Child Development
- Children
- About 40 newborns
- Where
- Not given in the summary we read
- Ages
- Newborns
- How
- Researchers measured how long babies looked at pictures
- What it found
- Newborns seemed to notice a change from two dots to three, but not from four to six.
- Limits
- We have only read the summary.