[DenisM]

You theory lends itself to validation. One aspect is timing - upvotes produced later after reading will be more thoughtful. The other aspect is effort - if upvote required certain effort over a length of time, that upvote too would be more meaningful. On the other hand, a short burst of heroic effort points to a reflexive reaction. If we could somehow inject effort into the voting we would get some really meaningful weights for each vote. This could be calibrated with manual review of sample comments. We could also use this knowledge to calm people down - confronting a person with a lengthy task might give them time to rethink their position.

So... how is that for an idea: having voted on something you get an option to return and double-down your vote, but no sooner than five minutes later. To try more things we could also show the user his recent upvotes, and mix in some comments he did not vote on, so that the user had to stop and think.

[tarr11]

I like the idea of timing. Perhaps putting voting buttons at the end of a comment instead of the beginning?