Correlation research is the method of sampling a population to ascertain a particular activity or to see whether a certain product is a popular one. Correlation is defined as a numerical relationship between two variables, and the research gives an indication as how the two variables affect each other in certain situations.

All forms of research have advantages and disadvantages, and one is normally as useful as the others.

- Advantages of correlation research method

- Disadvantages of correlation research method

All forms of research have advantages and disadvantages, and one is normally as useful as the others.