[LON-CAPA-users] Partial credits for option response problems

Stefan Bisitz lon-capa-users@mail.lon-capa.org
Tue, 10 Feb 2009 12:36:11 +0100


Hi,

I would like to use partial credits for problems with multiple option
responses. I remember discussions about this but can't find them
anymore.

In this special case I was asked if it is possible to provide credits as
follows:
- Two or more options, one part
- Each option which has been answered correctly: +1 point
- Each option which has been answered incorrectly: -1 point
- No negative points
- Apply weight (-> resource parameter) on the points sum

Example:
1+1=?
[true] 2
[true] 3-1
[false] 1

Student's answer:
[true] 2
[true] 3-1
[true] 1

+ 2 correct answers
- 1 incorrect answers
=> 1 point (max: 3)
Weight: 5
Credit: (1*3)/3 * 5


Thanks for any hints,
Stefan Bisitz