This study shows how ballot interfaces variably affect the voting performance of people with different abilities. An interface with all information viewable simultaneously might either help orient or overwhelm a voter, depending on he/her skill-set. Voters with diagnosed reading disabilities performed significantly better on full-faced voting machines than those who demonstrated a high likelihood of similar, but undiagnosed, disabilities. In contrast, the diagnosed group performed worse than others when using standard-sized Direct Recording Electronic (DRE) systems.
