My colleague, Kenny Tamarkin, developed this short student computer self-assessment rubric that was published in Adventures in Assessment.
When using this six-question rubric, he found students would spend just a few minutes reading the descriptions of the six types of computer users/learners and then would pick the number of the paragraph that came closest to describing themselves. He would collect the rubrics, look at the number that each student picked for themselves, and immediately have some insight as to the way he might teach his class. If he had a lot of learners describing themselves as one or two, he knew that they would probably need some extra attention and support. If students scored themselves as mostly fours or fives, he would try to push their limits more.