If you think the true sentiment is symmetric, you can just change the decision t...

		dhammack on Feb 20, 2015 \| parent \| context \| favorite \| on: Ask HN: Sentiment Analysis – how to handle biased ... If you think the true sentiment is symmetric, you can just change the decision threshold so that your algorithm answers positively about half the time. Just say positive when the sentiment is greater than the mean sentiment over your training set.

This is an interesting approach to normalisation - will give it a go :)