The only type of "radio" buttons that a Word document has is ActiveX optionbuttons. Is that what you are talking about?
Code:
Sub ScratchMacro()
'A basic Word macro coded by Greg Maxey
Dim oFld As Field
For Each oFld In ThisDocument.Fields
Select Case oFld.OLEFormat.ClassType
Case Is = "Forms.OptionButton.1"
oFld.OLEFormat.Object.Value = False
End Select
Next
lbl_Exit:
Exit Sub
End Sub