Describe a Participatory Design or Social Impact Statement process that might clarify this issue with elderly users.

The State of Maryland is developing a web-voting interface. For selecting the candidates, one design (RB) is a set of radio buttons and another is (CB) a combo-box (drops down when selecting the scroll arrow icon), both using standard fonts at 10-point size. Describe a Participatory Design or Social Impact Statement process that might clarify this issue with elderly users.