A Likert scale is one of the most common question types in survey research. Likert scales give you the opportunity to ask participants to rate a specific item. Sometimes it will be from low to high, sometimes from agree or disagree, and any other question that lends itself to answers within a range (like 1 to 10).
To take advantage of unique usability opportunities made possible by mobile phones, ProofPilot allows you to create the Likert scale as a slider. This means that participants can drag their finger (or mouse) across a range of answers as opposed to making a single defined selection.