Separate and joint scaling of perceived odor intensity ofn-butanol and hydrogen sulfide |
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Authors: | B. Berglund U. Berglund T. Lindvall |
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Affiliation: | 1. Department of Psychology, University of Stockholm, Box 6706, S-113 85, Stockholm, Sweden 2. Department of Environmental Design, Royal Institute of Technology, Stockholm, Sweden
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Abstract: | To determine which combination of scaling method and experimental procedure is optimal for measuring perceived odor intensity, the intensity perception of one odorous substance was scaled both separately and together with a second odorous substance in the same session. The methods used were magnitude estimation with and without a standard reference and cross-modal matching with finger span. The results show that separate and joint scalings ofn-butanol and H2S give identical scales, regardless of scaling method. Different results are obtained in magnitude estimations with a homoquality, a heteroquality, and no standard. From these results, one would not expect to find a single true power function independent of method. Cross-modal matching with finger span may be the best choice for odor intensity scaling, since it results in the widest response range, thereby giving the best resolution. |
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