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Related Experiment Videos

What does the lemon test measure?

D W Corcoran, J Hajduk

    Biological Psychology
    |June 1, 1980
    PubMed
    Summary

    Time of day and noise significantly impact salivary output in response to lemon juice. Noise had a greater effect on salivation in the morning compared to the afternoon.

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    Area of Science:

    • Physiology
    • Sensory Science

    Background:

    • Salivary response is a complex physiological process influenced by various stimuli.
    • Understanding factors affecting salivation is crucial for fields like dentistry and nutrition.

    Purpose of the Study:

    • To investigate the effects of time of day and auditory noise on salivary output.
    • To determine if there is an interaction between time of day and noise on salivation.

    Main Methods:

    • Salivary output was measured in 24 subjects.
    • Stimulus used was lemon juice.
    • Conditions included morning and afternoon, with and without noise presentation.

    Main Results:

    • Both time of day and noise significantly affected salivation.
    • An interaction effect was observed: noise increased salivation more in the morning than in the afternoon.
    • This suggests a diurnal variation in the response to auditory stimuli during gustatory stimulation.

    Conclusions:

    • Salivary response to lemon juice is modulated by both circadian rhythms and external sensory input (noise).
    • The interaction highlights the complex interplay between different physiological systems.
    • Further research is warranted to elucidate the neurophysiological mechanisms underlying these observed effects.

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