In reply to cb294 and others:
I might be wrong, but I gather (having answered the same questions many times in precisely this context) that the questions are taken from tried and tested 'scales' which measure certain personality traits, e.g. sensation seeking, and not written by the researcher. One problem is these scales were knocked up a few decades ago and now seem quite dated (I was quite amused by "I would like to meet a homosexual person").
There must be some purpose to all the strange double negatives too - presumably to test consistency of responses. But all this stuff is part of the standard psychologist's toolbox, rather than the researcher's skill of questionnaire design.
To the OP:
Note that this research has been done many times before! Not sure if any published though, maybe all BSc/MSc projects? A problem I have with getting respondents from UKC is that you get people who fall into the Venn diagram space "climber" + "internet forum user and self-selecting research participant" with the second category possibly having as much influence on personality as the first? All the people who find it boring, who can't put up with the imperfections of the scales, etc drop out midway through the questionnaire, so when you started with skewed sample of the people who clicked on the link, you end with one which is very very skewed. Interviewing people at a climbing wall might be a better way to capture a more representative sample of climbers - but it's harder work!
Good luck anyhow.
Post edited at 21:14