What are difference between correlation method and experimental method?

Answer 1

In correlational studies a researcher looks for associations among naturally occurring variables, whereas in experimental studies the researcher introduces a change and then monitors its effects.

For instance, a correlational study might look at variables that cannot be manipulated for the purposes of the study. For instance, is height correlated with how much people earn? Or, is intelligence correlated with marital happiness? You would be giving subjects tests and surveys to answer these questions, but could not manipulate the variables. In addition, I don't think that there is a "control group" for comparison purposes.

On the other hand, an experimental study involves comparing two groups - and manipulating the variables. For instance, let's say the question is, "Does caffeine improve test performance?"

Group 1 would have your subjects come to the lab and take some kind of test, making sure that they had had no caffeine within the last 24 hours, or some such scenario.

Group 2 would have the same group of subjects come to the lab, drink a cup of coffee (or something) 20 minutes before taking a similar version of the first test (so there are no practice effects), and then comparing Group 1 and Group 2's scores to see if there was any significant difference.

Answer 2

differenc btwean co relation or experimental method