An Initial Test of Reconsolidation in Disgust-Related Learning and Extinction

Area of Science:

• Psychology
• Neuroscience
• Behavioral Science

Background:

• Disgust associations are implicated in anxiety-related disorders.
• Understanding mechanisms to modify these associations is crucial for therapeutic interventions.
• Reconsolidation theory suggests memory can be altered during a specific window after retrieval.

Purpose of the Study:

• To determine if a single unreinforced retrieval trial, spaced relative to extinction learning, can prevent the return of disgust.
• To investigate the effect of timing between a reactivation intervention and extinction on modifying disgust associations.
• To explore the potential of 'rewriting' learned disgust responses.

Main Methods:

• Participants (n=54) underwent classical conditioning with disgust-relevant unconditioned stimuli (US) and a color conditioned stimulus (CS).
• A reactivation intervention (unpaired CS+ presentation) was administered 24 hours later.
• Participants were randomized into groups receiving extinction trials 10 minutes or 6 hours after reactivation, or a control group without reactivation.

Main Results:

• Extinction learning within the reconsolidation window did not significantly alter self-reported disgust reduction or reinstatement.
• Participants receiving reactivation, irrespective of timing, showed a trend towards evaluating the CS+ as less unpleasant post-extinction compared to acquisition.
• This trend was not observed in the control group that did not receive reactivation.

Conclusions:

• A single retrieval trial followed by extinction learning does not appear to prevent the return of disgust.
• Reactivation prior to extinction may facilitate a reduction in the subjective unpleasantness of the conditioned stimulus, even if it doesn't eliminate the disgust response.
• Findings suggest potential, albeit limited, avenues for modifying disgust associations, with implications for understanding and treating disgust-related disorders.