Why do babies going through a severe stranger anxiety don’t seem to be bothered by stranger kids? At what age/height/weight/other factors do they internally differentiate between kids and adults?

Question

Why do babies going through a severe stranger anxiety don’t seem to be bothered by stranger kids? At what age/height/weight/other factors do they internally differentiate between kids and adults?

In: Biology

Answer 1

I suspect it has as much to do with vocal pitch as anything, babies tend to prefer higher pitched voices.