Doug,
Answer to question 1:
Authors can include parameters within a problem to cause the randomization to
change after N tries, by setting the questiontype parameter to randomizetry,
and the randomizeontries to N, e.g.,
<parameter description="Question Type" name="type" default="randomizetry"
type="string_questiontype" />
<parameter description="Tries before new Variation (if Qn.
Type=randomizetry)" name="randomizeontries" default="3" type="int_pos" />
If you use the colorful editor, and select "Parameters for a part" in an Insert
drop-down list item, you can then insert these parameters by using the "Use
template" drop-down list to selecting either "Question type" or "Tries before
new Variation (if Qn. Type=randomizetry)". In the first case, enter a value
of: randomizetry in the Default: textbox, and in the second enter the desired
number of tries (e.g., 3) in the Default: textbox.
If the questiontype parameter is set to randomizetry, but randomizeontries is
not set, then a default value of N = 1 is used.
In course context when you include a parameter within a problem itself, that
parameter will be listed in the "Resource Level" default column when displaying
Content Settings for that particular resource. (The resource level default can
be overridden by setting a value for the same parameter in the "in Course" for
Resource column in table mode, i.e., further to the right).
Currently, including a randomizeontries parameter within a problem does not
change the behavior when viewing in Authoring Space (N=1 applies), although the
parameter you set will be in effect when viewing in course context. In
addition, when the randomizetry parameter is included within a problem, the
text: "New Problem Variation After Every N tries" is displayed in course
context, but not when viewing in Authoring Space.
I have filed a bug (6917) and have implemented code changes so viewing in
Authoring Space is consistent with viewing in course context. (See
bugs.loncapa.org/show_bug.cgi?id=6917 for details).
Answer to question 2:
If the problem is a cs or ci stringresponse type problem, then in a script
block you could loop over the attempt history and retrieve the "Computer's
answer" for a particular attempt via:
&EXT("user.resource.$i:resource.<partID>.<responseID>.answerstring")
(you would remove the text: "INTERNAL:" from the value returned by the &EXT()),
and you could retrieve the submission for that particular attempt via:
&EXT("user.resource.$i:resource..<partID>.<responseID>.submission")
where $i is the transaction counter, as discussed in an earlier thread on this
list (see: mail.lon-capa.org/pipermail/lon-capa-users/2018-October/005362.html).
However, rendering both the instance of the question for the randomseed in
effect, and the computer's answer for a responseitem that is not ci or cs
stringresponse, would require implementing a change within LON-CAPA to display
the output from rendering for these different targets with the current
randomseed, along with an "Additional tries with new problem variation" button
to proceed to access additional attempt(s) with the new randomseed. I have
filed an enhancement request for this, see:
bugs.loncapa.org/show_bug.cgi?id=6918
I do not know whether questiontype=randomizetry is in use by any instructors.
This questiontype was originally implemented to satisfy a request from ECE
instructor(s) in the uiuc domain, but I believe ECE course(s) at uiuc no longer
use LON-CAPA.
Aside from the use of a questiontype set to randomizetry, you could also
explore (a) the use of conditional blocks within a .problem, or (b) the use of
a .page containing multiple instances of the same resource, linked together by
conditional links, as ways of accomplishing your goal (albeit with a potential
side effect on points possible totals for a folder and/or course when using the
standard gradebook).
Stuart Raeburn
LON-CAPA Academic Consortium
________________________________________
From: LON-CAPA-users <[email protected]> on behalf of
Mills, Douglas G <[email protected]>
Sent: Wednesday, October 30, 2019 10:31 AM
To: Discussion list for LON-CAPA users
Cc: Mills, Douglas G
Subject: [LON-CAPA-users] 2 questions
Happy Fall -- it seems to be arriving here in Champaign Urbana at least.
I am wondering:
(1) Is there a parameter that can be coded into a problem to refresh variables
after x number of attempts? I know this can be done in the content parameters
and that that is the preferred Lon-Capa approach, giving instructors greater
autonomy over such decisions, but for specific problems in a specific course,
the instructors are interested in after, say 3 tries, giving the student the
answer to the current version of the problem and presenting a re-randomized
version. Which leads to my second question:
(2) If in the scenario above we randomize a problem after x number of tries, is
there a way to refer to the previous randomized values so that in addition to
the new version the student can be shown something like "The problem you were
trying to solve was ... and the correct answer to that problem is ..." ? There
are so many possibilities for creative implementations in Lon-Capa I'm pretty
sure I can figure out a way of accomplishing this, but thought I'd go ahead and
ask first since there are also so many ways of accessing behind-the-scenes
information in Lon-Capa.
Thanks all!
Doug
DOUGLAS G MILLS
Director of Instructional Technology
Department of Chemistry
University of Illinois at Urbana-Champaign
Chemistry Annex Box A2
601 S. Mathews | M/C 712
Urbana, IL 61801
217.244.5739 | fax: 217.244.8029 |
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