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A factor analytic comparison of dichotomous and polytomous response categories

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dc.contributor.advisor Dr. Carin Hill; Prof. Deon de Bruin en_US
dc.contributor.author Vorster, Paul Petrus
dc.date.accessioned 2012-06-06T07:51:39Z
dc.date.available 2012-06-06T07:51:39Z
dc.date.issued 2012-06-06
dc.date.submitted 2011-05-24
dc.identifier.uri http://hdl.handle.net/10210/4941
dc.description M.Comm. en_US
dc.description.abstract It was investigated whether dichotomous (2-point) or polytomous (5-point) rating scales have superior functioning on the personality construct Soft-Heartedness for the South African Personality Inventory (SAPI). The optimal number of rating scale categories for a personality measure was explored. The participants comprised students of diverse racial and cultural backgrounds at a South African tertiary institution (N =708). Two alternate forms of a test measuring Soft-Heartedness were administered to two alternated groups (n1 = 344; n2 = 364). Either version of the test contained a 2-point and 5-point version. These two formats were then factor analysed and subjected to a tetrachoric/polychoric correlation analysis. They were also tested for reliability using the Cronbach Alpha coefficient and composite reliability coefficient. In addition, the coefficient of congruence was established. It was found that the 2-point scale has more functional psychometric properties than the 5-point scale regarding the factor structure and composite reliability. This was attributed to cultural, perceptual, linguistic, educational, and test-experience components. en_US
dc.language.iso en en_US
dc.subject Psychometrics en_US
dc.subject Psychiatric rating scales en_US
dc.subject Factor analysis en_US
dc.subject Factorial experiment designs
dc.title A factor analytic comparison of dichotomous and polytomous response categories en_US
dc.type Mini-Dissertation en_US

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