> For such an interesting and perhaps important line of work, there seems to be a surprising lack of psychometric rigor in certain corners of the literature.

I agree! That's why I wrote it

> I'm skeptical that this is a reliable analysis

I think it's fair to ask whether the headline ("Claude is More Anxious than GPT") is correct, and it's fair to ask whether distance-to-reference-text-embeddings-across-answers is a good or valid metric for "personality". But it is true that we see the numbers reported in the document for the given input/output pairs, and it makes sense that LLM output distribution would vary between models and, as the paper shows, between model families.