Abstract
A casein solution was intubated into rats' stomachs via a stomach cannula, and animals were dosed with lithium chloride 5 min, 1 hr, or 24 hr later. When olfactory cues were not eliminated completely rats showed an aversion of the same magnitude as when they were exposed to a casein smell alone (Experiment I and Experiment III). When olfactory cues as well as taste cues were eliminated (Experiment II) rats did not learn an aversion of the substance. Postingestional factors are not sufficient for the formation of a taste aversion.
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