Why is it nesessary for researchers to understand a good deal about the way of life of people they are studying?

Why is it nesessary for researchers to understand a good deal about the way of life of people they are studying? What problems could arise if, say, a researcher started research on the Amish, Korean and Americans or some distinctive other category of people and had no understanding of their way of life.

It is extremely necessary for researchers to have a good understanding of the way of life ofpeople they are studying in order to accurately interpret the data they collect and to be able to...