Developing Objective Linear Scale Data from Subjective Tests for Consumer Products

Young Chan Ko; Jong-Moon Park

doi:10.7584/ktappi.2016.48.1.019

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Developing Objective Linear Scale Data from Subjective Tests for Consumer Products

28 February 2016. pp. 19-26

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Abstract

In the consumer products industry, it has been highly desirable to develop objective test methods to replace subjective evaluation methods. In developing an objective test method, subjective evaluation data should be on a linear scale.

According to Thurstone’s theory of comparative judgment, a%-preference from a paired-comparison test can be converted to a linear-scale value. The required number (N) of paired-comparison tests increases dramatically as the number of products increases. This problem should be solved by classifying the total products into several subgroups consisting of 3–4 products in each group. By doing so, it can not only significantly reduce the number of required paired-comparison tests, but it can also obtain more reliable, reproducible data.

Keywords

Subjective testing

objective testing

linear scale

non-linear

paired-comparison

round-robin test

Thurstone interval scale value

normal deviate

References

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 48
No :1
Pages :19-26
Received Date : 2015-11-13
Revised Date : 2015-12-09
Accepted Date : 2016-01-15
DOI :https://doi.org/10.7584/ktappi.2016.48.1.019

Journal of Korea TAPPIISSN:0253-3200(Print)한국펄프종이공학회

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Literature Cited