If a researcher wants to force respondents to make explicit trade-offs among several attributes or features, the most appropriate scale for this purpose is a:

If a researcher wants to force respondents to make explicit trade-offs among several attributes or features, the most appropriate scale for this purpose is a: 









A. graphic rating scale.

B. constant sum scale.

C. likert scale.

D. smiling face descriptor scale.

E. rank-order scale.













Answer: B


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