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Chapter 2 · Survey: Measurement and Scaling · Slide 43/274

Constant Sum Scaling: Pros-and-Cons

Assessment

2.2 · Comparative Scales Assessment

Constant Sum Scaling: Pros-and-Cons

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Pros

  • Can measure small differences between objects without taking up too much time
  • Metrically scaled → flexible choice of analysis methods
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Cons

  • Results are limited to the list of objects rated — no statements about objects outside the list
  • Relatively high cognitive load on respondents, especially with long lists
    • Prone to arithmetic errors (e.g. distribution of 108 or 94 points)
QUESTIONSTAR · Dr. Paul Marx 43 / 274
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