Meltzoff and Moore have examined infants’ ability to imitate facial expression of a variety of sorts. They found that even newborns can imitate mouth opening and tongue protrusion. Other researchers...

Meltzoff and Moore have examined infants’ ability to imitate facial expression of a variety of sorts. They found that even newborns can imitate mouth opening and tongue protrusion. Other researchers have attempted to replicate Meltzoff and Moore’s findings. The best summary of our knowledge to date is: