This is a poll of how often after voting, you realize that you selected -- instead of ++, or ++ instead of --
It's difficult sometimes to realize that you didn't vote what you intend. But sometimes you realize it just as you click 'Vote', or if you use the browsers back button to go check it out.
Perhaps with OBJECTIVE input, suggestions for improving the voting system may come about.
There is no CowboyNeal or paco option. If you don't vote nodes, don't bother voting the poll, since your input provides no meaningful data.