Dr. xong, a developmental researcher, is interested in studying the influence of video games on the moral development of children. if dr. xong wants to control the type of game the children are exposed to and how long the children play the game, he should use:

Dr. Xong has to use The Naturalistic Observation. Naturalistic observation is used when must be analyzed someone in their natural environment, without interference from researchers, or without adding or changing anything of the environment investigated. This with the objective of gathering information in the most objective way possible.

I hope my answer can help you.

It’s actually still in the u.s.