Chem. Senses 24: 337-346,
1999
© Oxford University Press
Odor Identification, Consistency of Label Use, Olfactory Threshold and their Relationships to Odor Memory over the Human Lifespan
Neurologische Universitätsklinik Institut für Psychologie, Universität Wien, Wien, Austria; 1 Abteilung für Entwicklungspsychologie Institut für Psychologie, Universität Wien, Wien, Austria 2 Institut für Medizinische Psychologie, Ludwig-Maximilian-Universität München, München, Germany
Mag. Johann Lehrner, Neurologische Universitätsklinik, Allgemeines Krankenhaus, Währingergürtel 18–20, A-1097 Wien, Austria. e-mail:hannes.lerner{at}akh-wien.ac.at
The purpose of this study was to investigate olfactory threshold, odor identification, consistency of label use and their relationships to odor memory in the context of semantic/episodic memory across the human lifespan. A total of 137 subjects aged 4–90 years were tested with several olfactory test procedures. We found that olfactory sensitivity was well developed in children despite the finding that their odor naming and odor memory were inferior to that of adults. In the elderly population, olfactory functions gradually declined, with odor memory and odor identification demonstrating the most significant decline. Semantic encoding was differentially related to odor memory over the human age span. Whereas consistency of label use was the main predictor for odor memory in children and young adults, olfactory identification ability was the main predictor in the elderly study group. We also calculated response bias for the separate age groups and found no differences between children, young adults and elderly. However, with age false alarm rates increased. We conclude that children possess equal olfactory sensitivity compared with adults; however, due to limitations in linguistic capabilities and familiarity to odorants, odor memory and odor identification performance was limited. Additionally, our data indicate major alterations of olfactory processing in advanced age with substantial losses in odor memory and odor identification performance.
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