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Chemical Senses Advance Access published online on September 1, 2005
Chemical Senses, doi:10.1093/chemse/bji057
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© The Author 2005. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oupjournals.org
Accepted August 11, 2005

Article

Color Enhances Orthonasal Olfactory Intensity and Reduces Retronasal Olfactory Intensity

Brian J. Koza 1, Anna Cilmi 1, Melissa Dolese 1, and Debra A. Zellner 1*

1 Department of Psychology, Montclair State University, Montclair, NJ 07043, USA

* To whom correspondence should be addressed.
Debra A. Zellner, E-mail: zellnerd{at}mail.montclair.edu


  Abstract

The effect of color on orthonasal and retronasal odor intensities was investigated. When odorants were smelled orthonasally (i.e., through the nostrils), color enhanced odor intensity ratings, consistent with previous reports. However, when odorants were smelled retronasally (i.e., the odorous solution was put in the mouth), color reduced odor intensity ratings. These different effects of color on odor intensity (i.e., enhancement orthonasally and suppression retronasally) appear to be the result of route of olfactory stimulation rather than of any procedural artifact. This supports previous reports that retronasal and orthonasal odors are perceived differently.

Keywords: multimodal interaction; orthonasal odor; retronasal odor.
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