Based on his conception of responsible citizenship, john stuart mill felt that the best form of government was

John Stuart has based his conception of responsible citizenship with the best form of government in which he believes that the best form would be democracy. A democratic government is where someone who leads the people of which representatives are voted by people to lead them on.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.