I would recommend removing the word "Article" at each end, as it's redundant. The question asks you to rate the article, to that word is implicit. The user just needs to know which end is which, and "poor" is enough to indicate that number 1 is the low end.
As for the bold, I'd be inclined to remove it and perhaps use italics instead, to distinguish it from the questions themselves. Whatever is bolded is most important on the page, and "poor" and "excellent" are not the most important text. They are really just little asides to clarify what the numbers mean.
If anything, I would bold the questions, as these are really the most important parts, and bolding them would help the eye distinguish them. (You know for sure where each one starts and ends.)