alt Hacker NewsWell, the algorithms in social media that are rewarding "engagement" (but accidentally ripping society apart by fueling rage) have made the training data — online discussions — a very poor training medium for introspection.
So, if companies want training data on introspection, they would need to first fix what they broke (trust in each other and society) and have those discussions and realizations made public (by bringing back blogs where people might jot down their "maybe I've been an asshole" realizations) and rewarding other things than "engagement".
I get the impression this isn't really what is meant by introspection here. I think it means much more plainly that the model is aware of its own "state of mind" so to speak, not so much the sense of reflecting on one's actions. I don't think you'd necessarily need training data about humans reflecting on their behavior for the former to come about in a model, i think it'd have more to do with the architecture of the model (does the model allow for "awareness of the state of mind")