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http://dx.doi.org/10.7584/ktappi.2016.48.1.019

Developing Objective Linear Scale Data from Subjective Tests for Consumer Products  

Ko, Young Chan (SCAP-Tech Consulting)
Park, Jong-Moon (Departments of Forest Product & Engineering, College of Agriculture, Life & Environment Sciences, Chungbuk National University)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.48, no.1, 2016 , pp. 19-26 More about this Journal
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;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Ko, Y. C., Park, J.M. and Moon, B.G., Development of an Objective Softness Evaluation Method and Its Standardization for Hygiene Paper, Journal of Korea TAPPI 47(5):80-84 (2015).
2 Harper, F. D., Oriaran, T. P. and Litvay, J. D., Soft, Bulky single-ply absorbent paper having a serpentine configuration, U.S. Patent 6,372,087, Fort James Corporation., April 16, 2002.
3 Kim, J. J., Softness Properties of Fabric-like Tissue, Ph.D. Thesis, North Carolina State University, 1992.
4 Hallmark, H., Evaluation of tissue paper softness, Tappi J. 66(2):97-99 (1983).
5 Beuther, P. D, Ko, Young C, Pawar, P., Raynor W. J. Jr, Rekoske, M. J. and Ries, T. D., Molded Wet-pressed tissue, US 8,257,551, Kimberly Clark Worldwide, Inc., Sept. 4, 2012.
6 Thurstone, L. L., The law of comparative judgment, Psychological Review, 34(4):273-286 (1927).   DOI
7 Nunnally, J.C., Psychometric theory (2nd ed.), McGraw-Hill, New York (1978).
8 Box, G.E.P., Hunter, J.S. and Hunter, W.G., Statistics for Experimenters: Design, Innovation, and Discovery (2nd ed.), Wiley-Interscience, Hoboken, New Jersey (2005).
9 Design of Experiments, JMP6, A business unit of SAS, 2005.