A tip to survey creators: Please display all the questions on one page: formulate the questions accordingly. It is very tiresome to answer 5 questions, click to proceed, 5 questions, click, 5, click... It does not make you want to finish the survey. Thoughts on this?
Genuine surveys which are used with people who have a genuine interest usually have branching and logic. Have you used Product A... No? then you can skip a section. You've used Product B... then here's some questions. So long as there is a progress indicator I don't see the problem. Unless someone is holding a gun to your head you always have the choice to continue or not.
In addition to what Sarah said, I'd rather see a 10 page survey than have to scroll through 50 questions and textboxes, with just a <br /> between them, and I've seen too many of those. Has screen real estate really become so expensive?
Ideally people would take the whole survey. You can also formulate the question to not require branching. Do you have any experience with good surveys?
That is true. 50 and more questions is a lot for one page. How do you prevent people from getting tired of clicking through to the next page repeatedly?
Another thing, how often do you abandon a survey because its too long or you dont know how many more questions will come?