[Rasch] Number of options in survey questions

moritz heene moritz.heene at psychologie.uni-heidelberg.de
Tue Feb 28 19:30:12 EST 2006


Here are my references:

>Rost, J. (2002). When personality questionnaires fail to be 
>unidimensional. Psychologische Beitrage, 44(1), 108-125.

And:

>http://www.ipn.uni-kiel.de/aktuell/buecher/rostbuch/c31.pdf


Best,

Moritz.




At 12:17 27.02.2006 -0800, Agustin Tristan wrote:

>In all our cases we've seen that people doesn't respond at the central 
>category. it doesn't matter if you have 4 or 6 categories in our 
>questionnaires we don't see tendencies to answer at the center, instead 
>people tend to answer at the extreme categories.
>In the original document by Likert there are many scales with 5 categories.
>regards
>Agustin Tristan
>
>Michael Lamport Commons <commons at tiac.net> wrote:
>Me too. I always use 4 or 6
>
>My Best,
>
>Michael Lamport Commons, Ph.D.
>Assistant Clinical Professor
>Program in Psychiatry and the Law
>Department of Psychiatry
>Harvard Medical School
>Beth Israel Deaconess Medical Center
>234 Huron Avenue
>Cambridge, MA 02138-1328
>
>Telephone (617) 497-5270
>Facsimile (617) 491-5270
>Commons at tiac.net
>http://dareassociation.org/
>
>
>
>----- Original Message -----
>From: "Looveer, Juho"
>To: ;
>Sent: Monday, February 27, 2006 8:05 AM
>Subject: [Rasch] Number of options in survey questions
>
>
>Colleagues
>
>Something much simpler than recent issues . . .
>
>Years ago I was advised that we should use an even number of options for any
>survey questions (ie those with Likert-type responses); ( e.g. never -
>rarely - often - always)
>This would avoid the central tendency for respondents.
>
>However, most commercial surevys use an odd number of options ( e.g. never -
>rarely - sometimes - often - always)
>
>I am interested in any articles that discuss this issue, or any general
>comments from erudite practitioners.
>
>Regards
>
>Juho
>
>
>Dr Juho Looveer
>Manager, Data Collection
>Planning and Innovation
>NSW Department of Education and Training
>Level 5, 35 Bridge St Sydney
>GPO Box 33
>Sydney NSW 2001
>work phone: 956 18192
>fax: 956 18055
>Juho.Looveer at det.nsw.edu.au
>
>
>
>
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Dipl.-Psych Moritz Heene
AE Differentielle Psychologie und Psychologische Diagnostik
Psychologisches Institut
Universität Heidelberg
Hauptstr. 47-51
D-69117 Heidelberg

Tel.: +49 (0)6221-54 7281
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