Richard J. Stevenson studied learned contributions to flavor. Pairing an odor with a sweet or sour taste and later judging the odor alone tests whether experience changes its perceived taste-like properties. This separates a property of the odorant from a judgment shaped by its previous pairing history. [ref]
The acquisition of taste properties by odors by Richard J. Stevenson and others. 1995, Experiment 1, odor-taste pairings and later odor judgments
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