Which of the following researcher(s) conducted experimental research?

3: Which of the following researcher(s) conducted a combination of observation and Experimental Research?

 

4: Which of the following researcher(s) conducted philosophical research?

 

5: Which of the following researcher(s) conducted observational research?

 

6: Which of the following researcher(s) conducted introspective research?

 

7: Which of the following researcher(s) conducted experimental research?

 

8: Which of the following researcher(s) conducted theoretical research?

 

9: Which of the following researcher(s) conducted testing research?

 

10: Which of the following researcher(s) conducted statistical research?

 

11: Which of the following researcher(s) conducted longitudinal research?