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<p>A higher proneness to experiencing the emotion of disgust has been found in individuals with eating disorders (EDs). Differences in disgust-based aversive learning may contribute to this. This proof-of-concept study adapted an App-based paradigm originally designed to measure fear learning, to test disgust conditioning in individuals with EDs and healthy controls (HCs). The unconditioned stimulus (US) consisted of a vomit sound to elicit disgust. Two neutral shapes served as the conditioned stimuli (CS), with one (CS+) paired with the vomit sound and the other (CS-) unpaired. The application of rigorous data quality control procedures resulted in a final analytic sample of 59 participants (ED <i>n</i> = 42, HC <i>n</i> = 17), representing a ~ 52% exclusion rate. Excluded and retained participants did not differ significantly on most sociodemographic and clinical variables; however, some group-specific differences (i.e., gender) suggested that exclusion may not have been entirely random. Within the retained sample, successful disgust conditioning was demonstrated in both groups. Exploratory between-group comparisons indicated higher post-extinction disgust ratings for the CS + in the ED group compared with HCs; however, given the methodological constraints and underpowered HC sample, this finding should be interpreted with caution. This pilot study can be considered a starting point, providing a framework for future research to further refine the paradigm and test it within larger samples.</p>

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Remotely-administered app-based pavlovian disgust conditioning in individuals with eating disorders: a proof-of-concept pilot study

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Sevgi Bektas-Dag,
  • Thomas McGregor,
  • Murat Aksit,
  • Johanna Keeler,
  • Hubertus Himmerich,
  • Janet Treasure,
  • Valentina Cardi

摘要

A higher proneness to experiencing the emotion of disgust has been found in individuals with eating disorders (EDs). Differences in disgust-based aversive learning may contribute to this. This proof-of-concept study adapted an App-based paradigm originally designed to measure fear learning, to test disgust conditioning in individuals with EDs and healthy controls (HCs). The unconditioned stimulus (US) consisted of a vomit sound to elicit disgust. Two neutral shapes served as the conditioned stimuli (CS), with one (CS+) paired with the vomit sound and the other (CS-) unpaired. The application of rigorous data quality control procedures resulted in a final analytic sample of 59 participants (ED n = 42, HC n = 17), representing a ~ 52% exclusion rate. Excluded and retained participants did not differ significantly on most sociodemographic and clinical variables; however, some group-specific differences (i.e., gender) suggested that exclusion may not have been entirely random. Within the retained sample, successful disgust conditioning was demonstrated in both groups. Exploratory between-group comparisons indicated higher post-extinction disgust ratings for the CS + in the ED group compared with HCs; however, given the methodological constraints and underpowered HC sample, this finding should be interpreted with caution. This pilot study can be considered a starting point, providing a framework for future research to further refine the paradigm and test it within larger samples.