Along with the evolution, human kind has developed several methods to reach their goals. Many books and text are written to represent and express diverse ideas about this issue thanks to instinctive curiosity of mankind. These methods can vary from subjects to subjects. I will treat these above mentioned issue within this paper to exhibit an overview so that we can see all differences and resemblances. Besides this comparing of the research methods I will try to expose some research methods in relation to issue at hand since I believe these methods are partially case dependent besides their general resemblances. Methods should be based on creative approaches; they ought to be designed to satisfy some norms of performances. These norms must be well defined. When we want to make a research, it is useful to find out the cognitive structure of the objective. Human mind gains knowledge more effectively if he/she uses suitable methods. Subjects may assume this idea as a departure point to develop diverse ways to make research. This paper will explain the inseparable relationship between human cognition, method and research; since the combination of this trio is the keystone of gaining knowledge. Educators may have varying ideas about methods; yet, in my opinion, common sense would not allow them to think it is probable that one method should be used for all goals. Briefly, if the objectives which do not have characteristic likeness, they may require different research methods. Finally, I will add some experiential evident to clarify why domains matter concerning research methods in relation to their contents and also the present research methods in education by comparing them with their cognitive structures.