In Hamlin and Wynn's study of infants, they found that babies even as young as 5 months old prefer a puppet that

is in need of help from another puppet.
takes a bouncy ball from another puppet.
returns a bouncy ball to another puppet.
is mean to other puppets.

1 answer

In Hamlin and Wynn's study of infants, they found that babies even as young as 5 months old prefer a puppet that is in need of help from another puppet. This research suggests that infants have an inherent preference for helping behaviors and a sensitivity to social interactions at a very early age.