This applies to book reviews on GoodReads, but can be applied to other things, as well. It just might not be as easy to measure as it is on GoodReads.
(Be sure and click through to the Blogger post. I love this.)
Reshared post from +JD Savage
The always insightful +Cheryl Rainfield hosts an interesting guest post on dealing with bad reviews
http://bit.ly/No1GvW
Embedded Link

The linked article is by +Beth Revis - who doesn't seem to be as active on G+ as I'd like to see
Great article, Beth. Thanks for sharing your insights & a way to be constructive with negative reviews.