Researching abnormal behaviors may be correlational or experimental. There are few ethical concerns bothering on research in psychopathology. Magnitude and sample size play a very important role here. Sample size need to be very large to be significantly correlated. Correlational factors are examined as they are currently. Experimental research involves manipulating one variable and taking note of the effect on another variable.
This was German sociologist, Max Weber, often noted as one of the three founders of Sociology, he made associations between religious belief and economic growth.
