When care-givers and infants frequently engage in joint attention how is language development imacted?

Joint attention impacts language development positively.

Explanation:

Joint attention means shared focus of two people on one object. It means when one person indicates to another about the same object, may be by eye-gazing or pointing at that object, it is called joint attention.  

When the caregivers and infants frequently engage in joint attention, it positively develops the language of the infants. They try to speak their first word much earlier infants and also develop vocabulary. It helps infants learn new words and be more social because they try to see common things and interact.