A political compass test is accurate in a narrow sense. It is consistent, it is not a secret personality diagnosis, and it is good at separating people who agree on economics and disagree on authority. It is not a measurement of your moral worth, your party, or how you vote on a single bill.
What the score actually is
PoliMap asks 20 forced-choice statements, ten economic and ten social. Each answer moves one axis. The published method turns those answers into a coordinate from -10 to +10 on each axis. You can read the arithmetic on the methodology page. If the questions are stable and the weights are public, two people with the same answers get the same dot. That is the kind of accuracy a quiz can honestly claim.
Where it fails
- Issues that do not sit on either axis, such as foreign policy alliances, get flattened.
- A party label and a personal coordinate are different objects. Labour voters are not all in the Labour dot.
- Famous-person placements are readings of public records, not quiz results. They are for comparison, not biography.
How to use it anyway
Treat the result as a location, then look at the cell it falls in. If you land in social liberalism or the right-libertarian region, read that page before you adopt the label. Then take the quiz again in a month. If the dot jumps across the square, the interesting question is which answers moved, not which nickname you deserve.