[LON-CAPA-users] questions about our first exam - partial marks

[Peter Dencker]

 I would be very interested to get code examples.

- Peter

On 02/03/2014 05:16 PM, Mills, Douglas G wrote:
> We have done something similar to your first challenge below by setting
> the weight of the problem equal to a variable and setting the variable in
> the Perl scrip at the head of the document based on how many tries have
> been taken on the problem using the relevant EXT functions. I can provide
> code examples if you¹d like.
> 
> Doug
> 
> Douglas Mills
> Director of Instructional Technologies
> Department of Chemistry
> University of Illinois
> dmills at illinois.edu
> (217) 244-5739
> 
> 
> 
> 
> 
> 
> 
> On 2/2/14, 9:48 PM, "Joseph Mingrone" <jrm at mathstat.dal.ca> wrote:
> 
>> Hello,
>>
>> I've been asked to write an exam and I'm struggling with the request to
>> assign students partial marks under certain conditions.
>>
>> The first condition is based on the number of tries the student takes to
>> get the correct answer.  For example, if the student gets the correct
>> answer on the second try (after a hint has been displayed) we would like
>> to give her half the weight of the question.  Maybe the custom response
>> problem is the way to go?  Maybe we're trying to force a square block
>> into a round hole?  If you've done this, example code would be great.
>> I've seen the post below, but the solution isn't clear to me.
>> http://mail.lon-capa.org/pipermail/lon-capa-users/2012-August/004127.html
>>
>> The second condition is for an Option Response with a foil group.  The
>> professor would like to assign 0.5 for each correct option chosen and
>> -0.5 for each incorrect option chosen.
>>
>> After reading the author manual, this is my best guess.
>>
>>  <part id="assumptions">
>>    <parameter name="maxtries" id="75" type="int_pos" default="1"
>> description="Maximum Number of Tries" />
>>    <parameter name="problemstatus" id="78" type="string_problemstatus"
>> default="answer" description="Show Problem Status" />	
>>    <startouttext />(g) Indicate the correct statements<endouttext />
>>    <customresponse>
>>      <optionresponse max="6" id="80" randomize="no"
>> TeXlayout="horizontal">
>> 	<foilgroup checkboxvalue="True" options="('True','False')" noprompt="1"
>> checkboxoptions="nochoice">
>> 	  <foil location="bottom" value="True" name="foil-ev">
>> 	    <parameter name="weight" id="94" type="float_pos" default="0.5"
>> description="Weight" />
>>            <startouttext />Statement 1<endouttext />
>> 	  </foil>
>> 	  <foil location="bottom" value="False" name="foil-es">
>>            <startouttext />Statement 2<endouttext />
>> 	  </foil>
>> 	  <foil location="bottom" value="False" name="foil-n8">
>>            <startouttext />Statement 3<endouttext />
>> 	  </foil>
>> 	  <foil location="bottom" value="True" name="foil-nd">
>>            <startouttext />Statement 3<endouttext />
>> 	  </foil>
>> 	</foilgroup>
>>      </optionresponse>
>>      <answer type="loncapa/perl">
>>       ### code here to check the indices of $$submission and add .5 for
>>    each correct option chosen and subtract 0.5 for each incorrect option
>> chosen... ###
>> 	return(ASSIGNED_SCORE,0.3);
>>      </answer>
>>    </customresponse>
>>  </part>
>>
>> Thanks for any tips,
>>
>> Joseph
>>
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> 
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-- 
Dr. Peter Dencker
    wissenschaftl. Mitarbeiter

UNIVERSITÄT ZU LÜBECK
    INSTITUT FÜR MATHEMATIK

    Ratzeburger Allee 160
    23562 Lübeck

    Tel +49 451 500 4254
    Fax +49 451 500 3373
    dencker at math.uni-luebeck.de

    www.math.uni-luebeck.de