Jones Talk, Slide 6
- Optical Mark-Sense Ballots
-- First use, early 1970's.
-- Growing use through 1990's.
- Essentially a modified Australian ballot.
- No ballot marking fixture required, just a pencil.
-- Weakness: Discrimination between votes and smudges.
-- Weakness: How do you make the voter use the right pencil.
-- Weakness: Mark sensing threshold variation versus voter intent.All physical ballots have a marginal mark problem. Interpreting marginal marks always raises subjective issues.-- Strength: Recount is possible.
-- Strength: Machine count is fast and can be very accurate.