I do not claim any expertise in this, but I think some people have mentioned the spreadsheet capability as a way to do this.
Mark On Feb 3, 2015, at 1:54 PM, Mills, Douglas G <dmi...@illinois.edu> wrote: > Hi All, > > I'm guessing there's probably a better way of doing this and someone on this > list has probably done it. Some of the instructors I work with would like to > give, say, 5 attempts on a homework or quiz question but with decreased point > value for each subsequent attempt, along the lines of 1point if you get it > right the first try, .8 points if correct on the second try, .6 points on > the third try, etc. > > Early one I tried the weight parameter with a variable for the value of it > that changed with the number of tries. That worked beautifully… in the > problem itself, but in the context of the assessment progress chart and other > places in Lon-Capa, the variable was not evaluated so the weight turned out > to be 0. > > Using "assigned_score" works well for this, but _as I understand it_ requires > use of the custom problem type. I've done a lot of these and appreciate their > power and versatility, but they have their downsides, perhaps for me the most > significant being the need to write code to evaluate significant figures and > tolerance, which are done so well for me in numerical response problems. > > The approach used by some of the instructors I work with who do their own > coding is to give the students access to the same quiz 3 times and then using > the timestamps to determine which was the first attempt, the second attempt > and the third attempt and plug those into excel to generate the best score > with the second attempt worth .8 of the full points possible and the third > attempt worth .6. They have to look at timestamps because of course the > clever and slightly unscrupulous students in the courses do these in reverse > order to use the lower-value quizzes to practice for the full-value quiz. I > proposed using sequences to prevent access to the lower value quizzes until > each of the subsequent quizzes has been attempted, but that has not caught on. > > So, is there a way, within one quiz, to allow multiple attempts at each > question and automatically decrease the point value of that question for each > attempt besides using "assign_score" (or is there a way to get tolerance and > sig fig functionality into a customresponse without coding it yourself?) > > Or some other way to approach this that I'm missing? > > Thanks as always! > > Doug > > Douglas Mills > Director of Instructional Technologies > Department of Chemistry > University of Illinois > dmi...@illinois.edu > (217) 244-5739 > > _______________________________________________ > LON-CAPA-users mailing list > LON-CAPA-users@mail.lon-capa.org > http://mail.lon-capa.org/mailman/listinfo/lon-capa-users -- Mark Lucas email: luc...@ohiou.edu 252D Clippinger Lab phone: (740)597-2984 Department of Physics and Astronomy fax: (740)593-0433 Ohio University Athens, OH 45701 _______________________________________________ LON-CAPA-users mailing list LON-CAPA-users@mail.lon-capa.org http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
