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Stimulus modality
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===Tests=== A common [[psychophysics|psychophysical]] test of olfactory ability is the triangle test. In this test, the participant is given three odors to smell. Of these three odors, two are the same and one is different, and the participant must choose which odor is the unique one. To test the sensitivity of olfaction, the staircase method is often used. In this method, the odor's concentration is increased until the participant is able to sense it, and subsequently decreased until the participant reports no sensation.<ref name="Wolfe" />
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