I am marking a dissertation and the student has used an ordinal likert scale (very happy, happy, neither happy nor unhappy, unhappy, very unhappy) as an Independent variable and another scale item as a dependent variable.
I am deeply concerned about this practice but before I note it as incorrect I would like to find out if anyone in this group knows if this is acceptable. The variable has been treated as an ordinal scale throughout the dissertation and no rationale has been provided for using it as a categorical variable for the purposes of the ANOVA. Furthermore the sample sizes between the so called categories differs drastically (23 for one and over a thousand for another as an example).
Would anyone have an opinion they care to share.
I think you would want to have a look at this page.
http://www.theanalysisfactor.com/when-dependent-variables-are-not-fit-for-glm-now-what/
Hope it helps.
Hello Dr Murphy, I am not certain, but you could look at the electronic stats book that is on the favourite links page of my website for info or otherwise why not search for someone in Australia whom has knowledge, this is one example of a publication in a journal I have access to. I can send you full text if you wish. Best Wishes,
Deborah Hilton Statistics Online
http://sites.google.com/site/deborahhilton/
A scale to measure attitudes toward community medicine
Isobel E. Rolfe*,
Sallie-Anne Pearson*
Article first published online: 13 MAY 2008
DOI: 10.1111/j.1467-842X.1996.tb01060.x
Issue
Australian and New Zealand Journal of Public Health
Volume 20, Issue 4, pages 433–435, August 1996
Author Information
Faculty of Medicine and Health Sciences, University of Newcastle
* Evaluation, Faculty of Medicine and Health Sciences, University of Newcastle, Callaghan, NSW 2308. Fax: (049) 215 669.
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Abstract: A questionnaire to measure attitudes toward community medicine held by general practitioners was designed, and a 35-item scale with a Likert response format was constructed. The Attitudes Toward Community Medicine scale consists of six subscales relating to key areas of community medicine. The final scale is valid and reliable for group comparisons, with alpha coefficients ranging from α=0.54 to α=0.84. The instrument may be used to evaluate the effectiveness of community medicine teaching, to describe differences in beliefs of practitioners and to estimate changes in attitudes over time.
First im sorry its not an answer but more of a request, to Deborah Hilton ,
Could you please also send me the full pdf text of the article you mentioned to my email ([email protected]) thank you before.
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