<p>I wouldn't take it hard.  Most of the views of a question come from people seeing the title on the main page and finding it interesting, either as something that they think they can contribute a helpful answer for or as something they want to understand better themselves.  There is a certain amount of 'churn' on the main page (which is a good thing), and so when the thread gets pushed off the main page its ability to draw attention goes down considerably.  Without a question being edited or answered (and so 'bumped' back to the top) it will drop off of the main page within a day.  Thus, the "for a week" part of the definition of tumbleweed isn't as bad as it seems.  </p>

<p>My take here is that your question is good (in the sense of being useful and clear and showing research effort, etc.) and is definitely on-topic for CV.  However, it is also quite specialized, even esoteric.  My sense is that most questions on CV are about fairly basic aspects of linear models and hypothesis testing, and that the bulk of the CV users are most comfortable with topics like those (for example, I am).  As a result, few people might be drawn to your question before it drops off the main page.  This is unfortunate, particularly in your case.  </p>

<p>I used to read through the new badges everyday, including going through the tumbleweeds to see if they needed work or just to be bumped, but I do that much less often now that the new badges are no longer on the main page.  You will probably get some more attention arising from this meta thread, but we can also add a bounty if you want.  </p>
