Rescripting a Memory Works Better When You Wake It Up First
- 61 healthy participants underwent fear acquisition and generalization on Day 1, then were split into two intervention groups on Day 2: reactivation followed by imagery rescripting plus extinction, or imagery rescripting plus extinction without a prior reactivation step.
- On Day 3, return of generalized fear was tested through unsignalled presentations of the unconditioned stimulus (reinstatement).
- The group that received a brief reactivation step before rescripting and extinction showed attenuated skin conductance responses and higher valence ratings for the conditioned stimulus at reinstatement.
- The group without the reactivation step showed a weaker reduction in reinstatement, despite receiving the same rescripting and extinction procedure.
Imagery rescripting changes how a memory feels by introducing a different, safer outcome into it; extinction changes what a memory predicts by repeated non-aversive exposure. This study from the Indian Institute of Technology Roorkee asked whether doing both inside the brief reconsolidation window opened by a reactivation cue beats doing both without that window.
Two Mechanisms, Aimed at Generalized Fear Specifically
The design targeted generalized fear, not just fear of the originally conditioned stimulus, which is the form of fear most resistant to standard extinction and the form most relevant to anxiety disorders that spread beyond a single trigger. Imagery rescripting alters the valence of the aversive outcome itself; extinction targets the expectancy that a cue predicts that outcome. Combining them offers two independent routes to the same result.
Reactivation Made the Difference
Adding a brief reactivation step before the combined intervention produced a measurably smaller return of fear at reinstatement than the same intervention without it. The comparison group was not a no-treatment control; it received identical rescripting and extinction, which isolates reactivation, and the reconsolidation window it opens, as the variable that mattered.
Integrating ImRS with post-retrieval extinction may offer a novel therapeutic pathway for reducing fear relapse.
The sample was 61 healthy adults tested in a laboratory fear-conditioning paradigm, not a clinical population with an anxiety disorder, and reinstatement was tested days rather than months later.