Chou Chia-Ying, La Marca Roberto, Steptoe Andrew, Brewin Chris R
Clinical, Educational and Health Psychology, University College London, London, UK.
Psychophysiology. 2014 Mar;51(3):236-46. doi: 10.1111/psyp.12176. Epub 2014 Jan 8.
The current study adopted the trauma film paradigm to examine potential moderators affecting heart rate (HR) as an indicator of peritraumatic psychological states and as a predictor of intrusive memories. We replicated previous findings that perifilm HR decreases predicted the development of intrusive images and further showed this effect to be specific to images rather than thoughts, and to detail rather than gist recognition memory. Moreover, a group of individuals showing both an atypical sudden reduction in HR after a startle stimulus and higher trait dissociation was identified. Only among these individuals was lower perifilm HR found to indicate higher state dissociation, fear, and anxiety, along with reduced vividness of intrusions. The current findings emphasize how peritraumatic physiological responses relate to emotional reactions and intrusive memory. The moderating role of individual difference in stress defense style was highlighted.
本研究采用创伤电影范式，以检查影响心率（HR）的潜在调节因素，心率作为创伤周围心理状态的指标以及侵入性记忆的预测指标。我们重复了之前的研究结果，即创伤周围心率下降预示着侵入性图像的出现，并且进一步表明这种效应特定于图像而非想法，以及细节而非主旨识别记忆。此外，还识别出一组个体，他们在受到惊吓刺激后心率出现非典型的突然下降且具有较高的特质解离度。仅在这些个体中，发现创伤周围心率较低表明状态解离、恐惧和焦虑程度较高，同时侵入性记忆的生动程度降低。当前的研究结果强调了创伤周围生理反应与情绪反应及侵入性记忆之间的关系。突出了个体应激防御方式差异的调节作用。
