Response times and response accuracy for odor localization and identification.

Area of Science:

• Neuroscience
• Sensory Science
• Olfactory Research

Background:

• Chemical senses are less explored than vision or audition.
• Assessing olfactory function often involves dichotomous odor stimuli for identification or localization.
• Response times are being considered as a supplementary measure for olfactory assessment.

Purpose of the Study:

• To explore olfactory localization and identification mechanisms.
• To investigate the correlation between response times and accuracy in olfactory tasks.
• To determine the pertinence of response times as an additional measure for olfactory function assessment.
• To examine the reported right nostril advantage in olfactory perception.

Main Methods:

• 23 normosmic participants received single-nostril stimulation with benzaldehyde or eucalyptol.
• Trials involved either odor identification or nostril localization tasks.
• Response accuracy and response times were recorded.
• Stimuli were delivered pseudorandomly with odor-free air to the contralateral nostril.

Main Results:

• Odor identification accuracy was higher than localization accuracy, particularly for benzaldehyde.
• For eucalyptol, participants responded faster to right nostril stimulation than left nostril stimulation during localization.
• Response times correlated with accuracy in the identification task, but not in the localization task.

Conclusions:

• Odor identification is generally easier than odor localization.
• Findings support the hypothesis of a right nostril advantage in olfactory perception.
• Response time measurement can potentially supplement existing methods for assessing odor identification.