Determining if Interaction Was Answered Correctly

I've always wanted to be able to determine in a trigger if an interaction on a given page has been answered correctly or not. I've had various workarounds to do this, but have come up with a new one:

To determine in an interaction has been answered correctly, check to see if the "Continue" button that dismisses the correct feedback layer has been visited.

Is this the best way to do this in a trigger?

Now only if I could determine from a trigger on the master slide layer if the page was an interaction, and determine the status of that interaction. Then things would be much more simple since I could build complex navigation controls on the master layer instead of each slide...

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