Decision Box

I made a Bills application. I have "Decision Box" in my form so I can check the box to mark a bill paid. I am trying to make a view that only displays records that do not have the box checked. I have tried 0 and 1, true and false. yes and no, and checked. Nothing works. The screen where you set up a filter is not smart enough to present me with Boolean options and wants me to enter free text so I have to play guessing games to see how that value is stored. This needs to be corrected in the screen where you create the filter.
tod