The norm for standing distance between two friends during a conversation is about 3-6 feet in the United States, whereas it is only about 1-2 feet in Middle Eastern countries. This difference best reflects what type of psychology?

The norm for standing distance between two friends during a conversation is about 3-6 feet in the United States, whereas it is only about 1-2 feet in Middle Eastern countries. This difference best reflects is a type of psychology:

Sociocultural.

Explanation:

Sociocultural in psychology refer to the impact of surroundings and society on the culture of that society.
In America, the population of people per area is less than that in Middle Eastern countries. There is more flux of people in an area in those countries so this condition has led to the norm that standing distance between two friends during a conversation is about 1-2 feet in Middle Eastern countries.
Generally, you can see that the public places like shopping markets are crowded with people. The public transport is jam packed with people. So, they don't feel when someone is talking to them at a distance of 1-2 feet as people of the United States do.