With just Storyline (SL), you can't adjust the value of the built-in quiz variables. However, there is a workaround so SL can score a custom question.
The trick is to add your custom question to a multiple-choice (MC) question slide.
- Use just two responses for the MC: a "correct" button and and "incorrect" button. Hide those buttons, so the user doesn't see them and can't click them. (This is easiest to do with a Freeform Pick One. Just move the buttons off the slide.)
- Add a trigger to the Submit button that changes the "correct" button to Selected with the condition(s) that indicate they answered the custom question correctly. Include an Else statement that changes the "incorrect" button to Selected (which will happen if the conditions aren't met). Note: Be sure to put this trigger before the trigger that submits the interaction.
Depending on exactly how your custom question is set up, you may also need to add triggers to ensure the question can be properly reviewed and retried.
