A
response non-response bias is not about the options being biased. It is about the people responding ... those opposed to the IOM would be expected to be more motivated than those who are not. I do not intend it as @
Firestormm seems to think I did. Those who are avoiding the IOM issue might therefore not vote, nor would those who know very little or nothing about the IOM issue. So those who are in the know, and who are motivated, might be predominantly those who oppose the IOM and support our experts, like me. Its something that has to be kept in mind, the people who read these threads are probably a self selecting group, and much more focused on the politics than most.
However if enough vote and the trend of over 90% continues, then I doubt its such a
response non-response bias, though it might still contribute a little to the numbers.
So if the trend continues it would be fair to say that those who are concerned about scientific and political advocacy overwhelmingly oppose the IOM on PR and support our experts, but it would not be fair to say most on PR do unless we have a poll with thousands of voters and a clear trend is evident over such numbers.
PS I confused
non-response bias with
response bias, hence the confusion. Ooops. Sorry.
http://en.wikipedia.org/wiki/Non-response_bias