was a little worried that my responses were biased by a desire to believe I am socially proficient.

I'm glad you mentioned that. These types of self-diagnostic tools have always seemed of limited use to me because of that kind of bias as well as the Dunning-Kruger effect. I don't trust my own responses at all, and I would guess I'm strongly biased by a desire to believe I'm socially proficient.

I'd imagine people's responses are heavily biased by their mood, as well: when I'm in a good mood I think better of my own abilities about almost everything, so I would guess my score would tend to fluctuate with my mood.