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Chem. Senses 25: 461-464, 2000
© Oxford University Press 2000

SHORT COMMUNICATION

Odor Discrimination and Task Duration in Young and Older Adults

Hilleke E. Hulshoff Pol, Ron Hijman, Wim F.C. Baaré, Sander van Eekelen and Jan M. van Ree1

Departments of Psychiatry and 1 Pharmacology, University Medical Center Utrecht and Rudolf Magnus Institute for Neurosciences, the Netherlands

Correspondence to be sent to: Hilleke Hulshoff Pol, University Medical Center Utrecht, Department of Psychiatry, A01.126, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands. e-mail h.e.hulshoff{at}psych.azu.nl

The effect of task duration on odor discrimination in aging was studied. Twenty-seven young male adults and 24 young female adults between 18 and 30 years of age, and 17 older male adults between 45 and 65 years of age completed an odor discrimination task. The odor discrimination task consisted of two parts of 16 trials each in which, from three bottles consisting of two identical and one aberrant odor, the aberrant odor had to be identified. The two parts were identical except that the aberrant odor was interchanged with the identical odors in the second as compared with the first part. Results revealed a decrease in odor discrimination with age. Moreover, with increased task duration odor discrimination performance decreased considerably in older male adults while it remained unchanged in young male adults. In addition, in young adults a small advantage in females as compared with males was found in the first part of the odor discrimination task, but this effect disappeared with increased task duration. In conclusion, task duration should be taken into consideration as a factor influencing odor discrimination in aging.


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