getScale(id).unselect() (since PennController 1.6)
Will unselect the option currently selected.
If the scale is a slider, it will set it back to the central value.
Example:
[js highlight=”5″ try=”true”]newScale(“score”, 10)
  .print()
,
newButton(“Unselect”)
  .settings.callback( getScale(“score”).unselect() )
  .print()[/js]
Prints a 10-point radio button scale and a button reading Unselect which, when clicked, unselects the currently selected button on the scale.