Journal of Chemical Ecology

, 32:1635 | Cite as

Olfaction and Identification of Unrelated Individuals: Examination of the Mysteries of Human Odor Recognition



Although several studies have examined the effect of human odor on kin recognition and mate choice, few have focused on the impact of familiarity on recognition of nonrelatives by olfactory cues. As part of a program designed to engage students in scientific research, 53 high school students researched, planned, and implemented a project to analyze the effect of odor on human recognition of, and preference for, friends, sex, and self. A total of 37 students, including friends of their choosing, wore T-shirts for three consecutive nights. During that time, subjects were controlled for exposure to extraneous perfumes, household odors, and other humans. The students were then asked to smell a series of five shirts and evaluate them with respect to pleasantness. Students were also asked to identify the shirts belonging to themselves and their friend, and determine the sex of the person who wore each shirt. Although subjects were unable to distinguish sex by olfactory cues alone, a significant percentage of subjects were able to identify their own odor (51.6%), as well as distinguish the odor cue of their friend (38.7%). Additionally, subjects who could not identify their friend's cue were apt to choose the odor of a member of the opposite sex as their friend. This result was not believed to rely on odor preference as neither individual, friend, nor stranger odors were rated significantly different with respect to odor pleasantness. The ability to recognize friends via odor cues lends credence to the hypothesis that association and familiarity are important aspects of conspecific olfactory recognition in humans. Furthermore, this study augments evidence that olfaction may supplement visual and auditory cues used in human conspecific and kin recognition.


Kin recognition Human social behavior Association Familiarity 


  1. Cernoch, J. M. and Porter, R. H. 1985. Recognition of maternal axillary odors by infants. Child Dev. 56:1593–1598.PubMedCrossRefGoogle Scholar
  2. Cooley, M. 2001. The Columbia world of quotations, <>.
  3. Devos, M., Patte, F., Rouault, J., Laffort, P., and Van Gemert, L. J. (eds.). 1990. Standardized Human Olfactory Thresholds. IRL Press, Oxford.Google Scholar
  4. Doty, R. L. 1981. Olfactory communication in humans. Chem. Senses 6:351–376.CrossRefGoogle Scholar
  5. Espelie, K. E., Wenzel, J. W., and Chang, G. 1990. Surface lipids of social wasp Polistes metricus Say and its nest and nest pedicel and their relation to nestmate recognition. J. Chem. Ecol. 16:2229–2241.CrossRefGoogle Scholar
  6. Griffiths, S. W. and Magurran, A. E. 1999. Schooling decisions in guppies (Poecilia reticulata) are based on familiarity rather than kin recognition by phenotype matching. Behav. Ecol. Sociobiol. 45:437–443.CrossRefGoogle Scholar
  7. Hays, W. S. T. 2003. Human pheromones: Have they been demonstrated? Behav. Ecol. Sociobiol. 54:89–97.Google Scholar
  8. Haze, S., Gozu, Y., Nakamura, S., Kohno, Y., Sawano, K., Ohta, H., and Yamazaki, K. 2001. 2-Nonenal newly found in human body odor tends to increase with aging. J. Invest. Dermatol. 116:520–524.PubMedCrossRefGoogle Scholar
  9. Hold, B. and Schleidt, M. 1977. The importance of human odour in non-verbal communication. Z. Tierpsychol. 43:225–238.PubMedGoogle Scholar
  10. Jacob, S., McClintock, M. K., Zelano, B., and Ober, C. 2002. Paternally inherited HLA alleles are associated with women's choice of male odor. Nat. Genet. 30:175–179.PubMedCrossRefGoogle Scholar
  11. Kaitz, M. and Eidelman, A. I. 1992. Smell recognition of newborns by women who are not their mothers. Chem. Senses 17:225–229.CrossRefGoogle Scholar
  12. Kaitz, M., Good, A., Rokem, A. M., and Eidelman, A. I. 1987. Mothers' recognition of their newborns by olfactory cues. Dev. Psychobiol. 20:587–591.PubMedCrossRefGoogle Scholar
  13. Lord, T. and Kasprzak, M. 1989. Identification of self through olfaction. Percept. Mot. Skill. 69:219–224.Google Scholar
  14. Mallet, P. and Schaal, B. 1998. Rating and recognition of peers' personal odors by 9-year-old children: An exploratory study. J. Gen. Psychol. 125:47–64.PubMedCrossRefGoogle Scholar
  15. Mateo, J. M. 2002. Kin-recognition abilities and nepotism as a function of sociality. Proc. R. Soc. Lond., B Biol. Sci. 269:721–727.CrossRefGoogle Scholar
  16. Mateo, J. M. and Johnston, R. E. 2000a. Kin recognition and the “armpit effect”: Evidence of self-referent phenotype matching. Proc. R. Soc. Lond., B Biol. Sci. 267:695–700.CrossRefGoogle Scholar
  17. Mateo, J. M. and Johnston, R. E. 2000b. Retention of social recognition after hibernation in Belding's ground squirrels. Anim. Behav. 59:491–499.PubMedCrossRefGoogle Scholar
  18. Olsen, K. H., Grahn, M., Lohm, J., and Langefors, A. 1998. MHC and kin discrimination in juvenile Arctic charr, Salvelinus alpinus (L.). Anim. Behav. 56:319–327.PubMedCrossRefGoogle Scholar
  19. Penn, D. J. 2002. The scent of genetic compatibility: Sexual selection and the major histocompatibility complex. Ethology 108:1–21.CrossRefGoogle Scholar
  20. Platek, S. M., Burch, R. L., and Gallup, G. G., JR. 2001. Sex differences in olfactory self-recognition. Physiol. Behav. 73:635–640.PubMedCrossRefGoogle Scholar
  21. Porter, R. H. 1999. Olfaction and human kin recognition. Genetica 104:259–263.CrossRefGoogle Scholar
  22. Porter, R. H. and Moore, J. D. 1981. Human kin recognition by olfactory cues. Physiol. Behav. 27:493–495.PubMedCrossRefGoogle Scholar
  23. Porter, R. H. and Cernoch, J. M. 1983. Maternal recognition of neonates through olfactory cues. Physiol. Behav. 30:151–154.PubMedCrossRefGoogle Scholar
  24. Porter, R. H., Balogh, R. D., Cernoch, J. M., and Franchi, C. 1986. Recognition of kin through characteristic body odors. Chem. Senses 11:389–395.CrossRefGoogle Scholar
  25. Porter, R. H., Makin, J. W., Davis, L. D., and Christensen, K. M. 1992. Breast-fed infants respond to olfactory cues from their own mother and unfamiliar lactating females. Infant Behav. Dev. 15:85–93.CrossRefGoogle Scholar
  26. Prasad, B. C. and Reed, R. R. 1999. Chemosensation: Molecular mechanisms in worms and mammals. Trends Genet. 15:150–153.PubMedCrossRefGoogle Scholar
  27. Purves, D., Augustine, G., Fitzpatrick, D., Katz, L., Lamantia, A.-S., McNamara, J., and Williams, S. 2001. The chemical senses. in (eds.) Neuroscience, 2nd ed., pp. 317–344. Sinauer Assoc., Sunderland.Google Scholar
  28. Rajakaruna, R. S., Brown, J. A., Kaukinen, K., and Miller, K. M. 2001. MHC genes influence the kin recognition in juvenile Atlantic salmon. Am. Zool. 41:1562.Google Scholar
  29. Russell, M. J. 1976. Human olfactory communication. Nature 260:520–522.PubMedCrossRefGoogle Scholar
  30. Russell, M. J., Mendelson, T., and Peeke, H. V. S. 1983. Mothers' identification of their infant's odors. Ethol. Sociobiol. 4:29–31.CrossRefGoogle Scholar
  31. Schleidt, M. 1980. Personal odor and non-verbal communication. Ethol. Sociobiol. 1:225–231.CrossRefGoogle Scholar
  32. Schleidt, M., Hold, B., and Attili, G. 1981. A cross-cultural study on the attitude towards personal odors. J. Chem. Ecol. 7:19–31.CrossRefGoogle Scholar
  33. Verron, H. and Gaultier, C. 1976. Processus olfactifs et structures relationnelles. Psychol. Fr. 21:205–209.Google Scholar
  34. Wallace, P. 1977. Individual discrimination of humans by odor. Physiol. Behav. 19:577–579.PubMedCrossRefGoogle Scholar
  35. Weisfeld, G. E., Czilli, T., Phillips, K. A., Gall, J. A., and Lichtman, C. M. 2003. Possible olfaction-based mechanisms in human kin recognition and inbreeding avoidance. J. Exp. Child Psychol. 85:279–295.PubMedCrossRefGoogle Scholar
  36. Wysocki, C. J. and Preti, G. 2000. Human body odors and chemical perception. Jpn. J. Taste Smell Res. 7:19–42.Google Scholar
  37. Wysocki, C. J. and Preti, G. 2004. Facts, fallacies, fears and frustrations with human pheromones. Anat. Rec. 281A:1201–1211.CrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Department of Entomology, NYS Agricultural Experiment StationCornell UniversityGenevaUSA
  2. 2.Biology DepartmentGeneva High SchoolGenevaUSA

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