[DDI-users] CATI - type surveys and the DDI

[Reto Hadorn]

Here a complementary note.

Actually the Tag Library recommends to enter the list of all questions to 
be asked under the condition defined as PCDATA, at least if the condition 
is restrictive (follow-up question not asked to all respondents). If the 
next question to be asked is the one to be asked to all respondents again, 
one question identifier only.

The handling of routing information is a tough issue anyway. I have thought 
of a solution for a relational database, which combines routing and 
filtering information. For more information, cf. page 
http://www.sidos.ch/mmg/vi/html/21.htm (for help on this information 
system: http://www.sidos.ch/mmg/vi/html/479.htm). The table design allows 
to generate the information needed for the forward and backward DDI 
elements, and more.

The model becomes more complex as soon as you consider distinct types of 
questions, like multiple response or item questions, or even grids with 
internal filtering. As to the computation of the sometimes complex 
conditions under which a filtered variable will have an 'inappropriate' 
type of code, all problems are not yet solved.


Best wishes

Reto




At 04.01.2005, you wrote:
>Currently this is handled by the <forward> element in <var><qstn>. Note
>that this is repeatable so that you can indicate the qstn ID in the
>attribute qstn and provide the logic in the PCDATA for example:
>
><forward qstn="Q2">If response eq 1</forward>
><forward qstn="Q4">If response gt 1</forward>
>
>Q2 and Q4 can have similar <backward> information indicating the possible
>previous questions.
>
>wendy
>
>
>On Tue, 4 Jan 2005, A. Michelle Edwards wrote:
>
> > Good morning all and Happy New Year...
> >
> > This may be a long way - so be forewarned :)  OK - the DDI codebook
> > documents the entire survey - all questions, answers, etc...  In a 
> situation
> > such as a CATI survey (as I understand it) - the respondent is asked
> > question 1 - based on his/her answer is then passed onto question 4 - and
> > then maybe onto question 12...  and so on.  Is there anyway we can capture
> > this "gateway" in the DDI codebook?
> >
> > Hmmm..  that was shorter than I expected and I hope this makes sense to
> > everyone....
> >
> > Michelle
> >
> > ___________________________________
> > A. Michelle Edwards, Ph.D.
> > Academic Services, CCS
> > Vehicle Services Bldg, University of Guelph
> > Guelph, Ontario
> > N1G 2W1
> >
> > PH: (519) 824-4120 Ext. 54539
> > FAX: (519) 767-1620
> > Email: edwardsm at uoguelph.ca
> > ___________________________________
> >
> > _______________________________________________
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> > DDI-users at icpsr.umich.edu
> > http://www.icpsr.umich.edu/mailman/listinfo/ddi-users
> >
>
>Wendy L. Thomas                          Phone: +1 612.624.4389
>Data Access Core Director               Fax:   +1 612.626.8375
>Minnesota Population Center              Email: wlt at pop.umn.edu
>University of Minnesota
>50 Willey Hall
>225 19th Avenue South
>Minneapolis, MN 55455
>
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