Doug,
You stated: "... is a one-part problem with 7 customresponses", and "All of the
other 6 customresponses are weighted at 0." Could you clarify how the
"weighted at 0" is implemented?
If the award is: "ASSIGNED_SCORE", then during grading LON-CAPA will loop over
all the response items in the problem part, accumulate the awarded value for
each, and then divide by the number of response items to calculate the value to
store for resource.$id.awarded.
The points shown with then be the weight * resource.$id.awarded. (Weights
apply to problem parts).
So, if you have 7 response items, and return (ASSIGNED_SCORE,1) for 6 of those,
and return ASSIGNED_SCORE,13/15) for the seventh, then the value of
resource.$id.awarded will be:
(13/15 + 1 + 1 + 1 + 1 + 1 + 1 )/7
which evaluates to: 0.9809524
When multiplied by a weight of 5, the result is: 4.904762, which is what you
were seeing in course context/
Stuart Raeburn
LON-CAPA Academic Consortium
________________________________________
From: LON-CAPA-users <lon-capa-users-boun...@mail.lon-capa.org> on behalf of
Mills, Douglas G <dmi...@illinois.edu>
Sent: Wednesday, March 20, 2019 11:22 AM
To: Discussion list for LON-CAPA users
Cc: Mills, Douglas G
Subject: [LON-CAPA-users] assigned_score and unexpected results
Hi All,
I have a word search activity implemented in Lon-Capa worth 5 course points if
completed with no hints. There are 12 words to find plus 3 "starter points"
that you can spend on 3 different hints for a total of 15 possible points. In
the course parameters I've weighted the activity to 5 points. In the activity
itself I've used assigned_score as follows:
if($submission eq "12|3"){return (ASSIGNED_SCORE,15/15)}; #12|3 means all words
found and no hints used, etc.
if($submission eq "12|2"){return (ASSIGNED_SCORE,14/15)};
if($submission eq "12|1"){return (ASSIGNED_SCORE,13/15)};
if($submission eq "12|0"){return (ASSIGNED_SCORE,12/15)};
My expectation then, for example, is that if I complete the puzzle using two
hints, in the course I should see 4.333 points awarded. However, what I'm
seeing in the course for that outcome is a score of 4.90476190476191 out of 5.
The Word Search problem itself is a one-part problem with 7 customresponses;
however, the score should be coming from only the customresponse with the
assigned_score section shown above. All of the other 6 customresponses are
weighted at 0.
So what am I missing? Thanks!
Doug
Douglas Mills
Director of Instructional Technology
Department of Chemistry
University of Illinois
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