On approximately 2/6/2010 6:28 PM, came the following characters from the keyboard of David N. Lombard: > Glenn Linderman wrote: >> Someone posed the question to me, if they could use their scanner for >> grading multiple choice tests. This is for someone in a volunteer >> teaching position in one of the less advanced, poor countries, but >> they do have an image scanner available. So I'm not a real expert in >> graphics manipulation and analysis, most of what I do in the way of >> graphics is generating print images for books, so I mostly use >> ImageMagick to help with some of the manipulations, but they are >> simple... crops, resizings, adding margins, and the like. > > If your purpose is to use the scanner, then yes, you probably could do > as you describe. > > Having written that, a simple mask sheet of paper, with a hole where > every correct answer dot should be may well be faster and easier.
Interesting, I hadn't thought of that. That sounds like a low-budget solution suitable for the situation, and requires no programming. One would have to manually pre-scan the form to make sure that the student hadn't marked multiple (even all) bubbles per question, though... or have a second mask sheet with all the wrong answers, to subtract them from the right answers. > BTW, I've never seen a multiple choice test with partially correct > answers. You get the answers right or you get them wrong. I have seen multiple choice tests with multiple correct answers... choose all that apply, or E for none of the above. So if you don't get all that apply, you could have a partially correct answer. > I had a fluid dynamics class where the prof only gave multiple choice > tests. He'd grade your test on the spot using a mask sheet as I > described--only took a few seconds. His motto was "I don't care how > you get there, as long as you land at the right airport." So, > guessing was advised if your computations didn't result in any of the > offered choices. > > At the time, I didn't like the lack of partial credit. Now though, I > know he was absolutely correct--in life, you either get the right > answer or you don't. Oh, in life, much more so than in fluid dynamics, there seem to be multiple answers to lots of things. Going there is way off topic, but I'll simply point out that most countries have more than one political party... because there are different thoughts about what is the right answer... of course, often all of the perceived answers are wrong, but that is yet a different problem... _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
