One of the problems with this test and chart can be seen with some examples. President John F Kennedy, who was a Democrat, was considered a liberal in his day. However, he had many policies closer to what would be called Conservative Republican, today. He believed in a strong military and tax cuts to boost the economy. The Conservative Republicans of today, are more liberal than they were 60 years ago. One would be hard pressed to see much difference between Kennedy of 1960, and a Republican today.
Bill Clinton believed in welfare reform and had Conservative views, like today, that led to economic prosperity. Obama used to believe in border control. The Progressive media called this centrist when it benefited the party. Now these same positions are no longer called centrist by the left, but are now considered radial right. This test has been rigged by years of media deception and left wing propaganda. It assumes you bought into many of the current left wing assumptions, of what defines center, today. Center should not change in a subjective way over time.
When religion was more prominent in US culture, in the 1950's, being without religion, was considered radical left. Now religion is called radical right, by the left, instead a centrist majority. Conservatives tend to conserve, while Progressives tend to try new things, often to divide people, for their own political advantages. The flip flop, on border control, is an example of two faces dividing people, to gain an advantage b moving the central goal post.
Say the chart and test was rewritten based on the centrist standards of 1960 or 1860, we would all end up in a different position based on these centers. Even modern conservative would swing more to the left, due to the impact of left wing media and forced social changes.
I believe in solutions that work, over solutions which benefit an ideology in the short term; election to election. That is the common sense middle that does not change with time. Running government with huge deficits is not an optimized solution. This is needed due to a lot of bad policy and legal obligations, that have move the goal post, called the common sense center, toward the left.