It's an ongoing research project on scratching as a successful 'new musical intstrument'. It'll be the topic of a PhD. The title page in the survey tells a bit more, and also there is a link to my web page.
In short: it seems scratching cannot be described exactly like other music (surprise), and I need to collect more data on how people experience the music...any answer will be really helpful!
Done. I found it quite hard to find different words for each scratching sample. That's mostly because scratching is really only used to express some kind of coolness or skill. I don't think you can, for example, express feelings like sadness with it.
Also, just a hint, next time make sure to state what you want in your opening post. It doesn't make clear that you want us to do the survey.