gustatory learning abnormal gustatory aversive learning abnormal C_elegans_phenotype_ontology Variations in the aversion of animals to substances sensed by gustation (taste) previously associated with an aversive stimuli during a gustation training protocol, compared to control. For example, C. elegans animals can be trained to associate the taste of a substance (e.g. sodium chloride, normally an attractant) to an aversive stimuli (e.g. starvation) so that trained worms will avoid the substance in the absence of the aversive stimuli. Animals with this phenotype will not exhibit the same aversion to the substance as compared to control animals. WBPhenotype:0002598