(APSA), which aims to explore issues “relevant to the problems of maintaining a high sense of professional standards and responsibilities.” Marver H. Bernstein served as the chairman of this committee. This committee created the first version of the written code of rules of professional conduct. In 1968, Standing Committee on Professional Ethics was founded. Their job mainly includes the review of formal grievances, mediation and intermediation to other organizations, and issuing formal advisory opinions. In 1989 and 2008, the code of rules of professional conduct was revised. Ways ahead in experimental political science After the 1970s, most political scholars began to use experimental methods to focus their research on political behaviour, public opinion, and mass communication. The classic topics include exploring the behavioural preferences and choices of different social groups in group actions, the influence of campaign propaganda on voting results in the voting process, the influence of media propaganda on public attitudes, and the influence of personality on political participation. Since the beginning of the 21st century, political science research has clearly shown a trend from correlation research to causality research. Political scientists are increasingly dissatisfied with just confirming the strength of the relationship between various factors, and gradually devote themselves to the discussion of causal effects and mechanisms among variables. To measure causal effects accurately is a significant problem and challenge in the social sciences. The means to keep inferences from selection bias in observational studies are minimal. In experimental research, randomly assigning the observation objects to the experimental group and the control group can ensure that there are no observable or unobservable differences between the research objects in theory before the practical operation. The objectivity of the conclusion is built on randomization in this way. The inherent flaws of various non-experimental study methods have been continuously exposed in the past 20 years. The most notable drawback among all is the limitation of observable data, which hinders researchers' further exploration of causality. In a modern society with highly developed information technology, it is becoming more and more efficient and low-cost to control and collect data by conducting experiments. The emergence of new communication methods and new media is both a challenge and an opportunity for social science research. These social media and online blogs transmit a large amount of political information and make it more accessible to the public. In the past, the information for social science research