Just please make sure that the more important and shorter questions are first, that you can skip any question, and that you can submit a half completed questionnaire.
(I hate it when I spend 30 minutes filling out some questionnaire, only to find out that there are long nebulous questions at the end, I already don’t have more free time, and there is no option to skip those questions, so I just have to throw all my work away.)
Or write something like “sorry, no time to give a real answer to this question” for each of the long nebulous ones. Probably almost as easy as giving up, and more useful-in-expectation to the people who made the questionnaire. (If there’s some reward for filling it in, this may reduce the probability that you’re eligible, but I doubt you’re filling in questionnaires just for the sake of the rewards offered.)
Just please make sure that the more important and shorter questions are first, that you can skip any question, and that you can submit a half completed questionnaire.
(I hate it when I spend 30 minutes filling out some questionnaire, only to find out that there are long nebulous questions at the end, I already don’t have more free time, and there is no option to skip those questions, so I just have to throw all my work away.)
Or write something like “sorry, no time to give a real answer to this question” for each of the long nebulous ones. Probably almost as easy as giving up, and more useful-in-expectation to the people who made the questionnaire. (If there’s some reward for filling it in, this may reduce the probability that you’re eligible, but I doubt you’re filling in questionnaires just for the sake of the rewards offered.)