[LON-CAPA-users] Decreasing values of successive attempts?

[Mills, Douglas G]

Hi Ray and Mark -- thanks. I think you've definitely pointed me in the right
direction. I hadn't really thought about scripting anything for this -- was
just thinking of whether or not there was some combination in the extensive
parameter table that could effect this, but I think you're right on and will
head that direction.

doug


On 8/24/12 3:39 PM, "Raymond Batchelor" <batchelo at sfu.ca> wrote:

> I don't do this, but I am wondering if you really need to go to
> customresponse.
What about grabbing the #tries with &Ext (or equiv) and then
> defining a weight variable in the perl script?

I'm sure the real pros can
> tell you the best way, soon, eh?

Cheers,
Ray

----- Original Message
> -----
From: "Mark Lucas" <lucasm at ohio.edu>
To: "Discussion list for LON-CAPA
> users" <lon-capa-users at mail.lon-capa.org>
Sent: Friday, 24 August, 2012
> 13:28:24
Subject: Re: [LON-CAPA-users] Decreasing values of successive
> attempts?

Doug,

I don't have a definitive answer for you, but in looking at
> the authoring manual, custom response
has a partial credit factor.   Remember
> that all the problem code can do is return a number between
0 and 1. This is
> then multiplied by the weight.

You might be able to:

* check number of
> tries

* check weight

* figure out the appropriate 'penalty' in term of the
> partial credit factor

* and assign appropriately using custom response.

I
> really think there's also a place you can set the partial credit factor in a
> regular problem as well
(for example, if they are within 1%, give 1; if within
> 2%, give 0.5 (half credit))

Later,
Mark



On Aug 24, 2012, at 4:18 PM,
> Mills, Douglas G wrote:

> Hi All,
> 
> Does anyone know of a way to decrease
> the value of a homework problem with each successive attempt, so that for
> example if a problem is worth five points on the first try, it¹s worth .25
> points less each successive attempt? Thanks,
> 
> Doug
> 
> Douglas Mills
>
> Director of Instructional Technologies
> Department of Chemistry
> University
> of Illinois
> dmills at illinois.edu
> (217) 244-5739 
> 
>
> _______________________________________________
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> list
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-- 
Mark Lucas
>         email: lucasm at ohiou.edu
252D Clippinger Lab      phone:
> (740)597-2984
Department of Physics and Astronomy  fax: (740)593-0433
Ohio
> University
Athens, OH
> 45701

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Doug

Douglas Mills
Director of Instructional Technologies
Department of Chemistry
University of Illinois
dmills at illinois.edu
(217) 244-5739