I don't think you made a mistake. This is just one of those topics that for some is subjective and for other is objective. As others have mentioned, getting pe

I don't think you made a mistake. This is just one of those topics that for some is subjective and for other is objective. As others have mentioned, getting people to assess themselves accurately is very difficult. We always seem to skew towards the overly-confident side - not least because this what is usually rewarded in the job market. Although it might be worth considering a simpler heuristic in the future as the distinction between Advanced and Expert is somewhat vague and perhaps ultimately not very informative.