What research could a developmental psychologist rely on when explaining to parents infant interaction and adult attention to children's faces?

Brain Scanning Technique Results

Explanation:

Based on the information provided within the question it can be said that the developmental psychologist can rely on Brain Scanning Technique Results. This is because these results have found out that the facial features of infants activate a specific part of the brain called the "fusiform gyrus" within an interaction. Therefore they can explain what the children's faces mean and how they affect the brain.

the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.