radio button question
I have four radio buttons as part of a self assessment. The user may press one or more buttons as applicable:
Because they may be required to press more than one button I have not created a button set. I have however set a modes of travel variable and set it to score a value for each radio button that is selected:
So far so good. My problem is if I have an indecisive user and they then deselect the button the score remains unchanged and if they are really indecisive and select it again the score will once more be added, thereby producing a false score.
My question is can another trigger be added to take the added value away if the button is deselected and can i prevent the score being added more than once. A simple answer would be to set another trigger as above with minus 5 if deselected but that option is not available in the drop down list.
Any suggestions or advice as always much appreciated