A classic study on this
Maternal emotional signaling: Its effect on the visual cliff behavior of 1-year-olds.
James F. Sorce, Robert N. Emde, Joseph J. Campos, Mary D. Klinnert · 1985 · Developmental Psychology
- Children
- Not given in the summary we read
- Where
- Not given in the summary we read
- Ages
- 12 months
- How
- Researchers tested babies in a lab
- What it found
- At 12 months, most babies crossed a small apparent drop when their mother looked happy, and very few did when she looked frightened.
- Limits
- We have only read the summary, which gives no numbers.