Five Thirty Eight uses a normal opinion poll to discover how popular a president is.
Presidential Approval Rating simplifies the results with graphics like this:
They’ve been using a similar method since World War 2.
One source is this:
There are only 3 measured states of preference: Approve, no opinion, Disapprove.
Positive, neutral (or unknown), Negative.
Given a sample of 12 votes (5 negative, 1 neutral, 6 positive), the result yields a Net: +1
Q-vote allows the expression of opinion at a higher granularity, the same Net response yields patterns of opinion that are much more meaningful.
The antiquated system becomes a joke.