The Role of Temporal Proximity in Fear Learning and Intrusive Memories during a Trauma Film Conditioning Paradigm.

This article focuses on a study investigating whether extinction of a conditioned stimulus presented simultaneously with a traumatic unconditioned stimulus (CSX) reduces intrusive memories and fear responses, key features of posttraumatic stress disorder (PTSD). Using a trauma film conditioning paradigm with 98 healthy participants, the study compared extinction effects of CSX and a conditioned stimulus preceding the trauma (CS+), measuring skin conductance and intrusive memories over several days. Results showed that CSX extinction did not decrease fear return or intrusive memory frequency compared to CS+ extinction, and reliable conditioning responses were not observed. These findings suggest that temporal proximity effects seen in shock-based conditioning may not apply to trauma film stimuli, indicating limitations in generalizing experimental fear models. [Extracted from the article]