My wife had an advanced mathematics course (University of Washington) where leaving an answer blank was worth 30% of the possible points. Any attempted answer was scored starting at 0.
This was meant to discourage hard-to-grade, crappy attempts at scoring a few points. Students would skip problems they didn't think they could answer well and focus their attention on problems where they thought they could put together a fairly solid answer.
This was meant to discourage hard-to-grade, crappy attempts at scoring a few points. Students would skip problems they didn't think they could answer well and focus their attention on problems where they thought they could put together a fairly solid answer.