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Creating Valid and Effective Measures: Using –optifact- to Create Better Summated Rating Scales

Paul Millar

North American Stata Users' Group Meetings 2005 from Stata Users Group

Abstract: While scales are an integral part of the measurements involved in many research projects, few researchers make the effort to ensure that these scales are valid, reliable, uni-dimensional and consistent with relevant correlates. This presentation outlines how the Stata routine –optifact- can be used to create summated rating scales that are better measures of the concept at issue, yet often require fewer questions. An example using a major Canadian survey is presented to illustrate the potential for better analysis and potentially substantial cost savings in survey research.

Date: 2005-07-12
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http://repec.org/nasug2005/BostonScales.ppt presentation slides (application/x-mspowerpoint)

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