Elisabeth Svensson: Different ranking approaches to different problems of scale assessments
Elisabeth Svensson, Örebro university
Time: Wed 2013-01-09 13.00 - 14.00
Location: Room B705, Department of statistics, Stockholm university
Rating scales are commonly used for self-assessments of attitudes and perceptions and also for expert-rating of the severity of a diagnosis, grading of performance etc. Irrespective of the type of scaling and of the number of possible response alternatives, assessments on scales and other ordered classifications generate ordinal data having the rank-invariant measurement properties in common. Hence statistical methods applicable to ordinal data are often based on ranks. The aim is to demonstrate two ranking approaches to evaluation of problems involving paired ordinal data. Differences in application and hence in interpretation will be demonstrated by empirical data.
References.
Svensson E., Holm S. Separation of systematic and random differences in ordinal rating scales. Statistics in Medicine 1994;13:2437-53.
Svensson E. A coefficient of agreement adjusted for bias in paired ordered categorical data. Biometrical Journal 1997;39:643-57.
Svensson, E. Application of a rank-invariant method to evaluate reliability of ordered categorical assessments. Journal of Epidemiology and Biostatistics, 1998; 3 (4):403-409.
Svensson E. Concordance between ratings using different scales for the same variable. Statistics in Medicine 2000;19(24):3483-96.
Svensson E. Guidelines to statistical evaluation of data from ratings scales and questionnaires. Journal of Rehabilitation Medicine 2001;33: 47-8.
Svensson E. Different ranking approaches defining association and agreement measures of paired ordinal data. Statistics in Medicine, 2012;31 :3104-3117. (wileyonlinelibrary.com) DOI:10.1002/sim.5382