Tonight with your 13 to 17 year old
The prompt
“Is there something you believe that you'd stick with even if it wasn't popular?”
What to listen for
If they answer with conviction, that's a strong sign of a developing inner compass, they're starting to hold beliefs because they've actually thought them through, not just to fit in, which is exactly what this stage of life is building toward.
If they hedge a lot or seem worried about how it sounds, reassure them there's no wrong answer here; the goal is just to hear what they actually think, not to test how defensible it is.
If they say they mostly go along with what others think, that's honest and worth respecting rather than correcting, you might just ask, gently, if that ever bothers them.
What this tells you
This reveals whether they're developing the confidence to hold their own values even under social pressure, which is central to becoming their own person.