To explore the relationship between doctors’ exposure to doctor-patient conflict information and defensive medical behavior and its psychological mechanisms, this study, based on the Extended Parallel Process Model (EPPM), conducted a survey of 216 doctors from various levels of hospitals in China to investigate the impact of interpersonal and media channels of doctor-patient conflict information exposure on their perceived severity, susceptibility, self-efficacy, response efficacy, fear, and defensive medical behavior. Data analysis and model testing were performed using the Partial Least Squares Structural Equation Modeling (PLS-SEM) with SmartPLS 4.1. Results showed that interpersonal exposure to doctor-patient conflict information was positively correlated with perceived susceptibility and negatively correlated with perceived self-efficacy. Media exposure to doctor-patient conflict information was positively correlated with perceived severity and susceptibility, and negatively correlated with perceived self-efficacy. Perceived severity and susceptibility positively predicted fear. Perceived self-efficacy and response efficacy were negatively correlated with fear, and fear positively predicted defensive medical behavior. Mediation analysis showed that perceived susceptibility and self-efficacy had significant sequential mediation effects between interpersonal conflict information exposure and defensive medical behavior. Perceived severity, susceptibility, and self-efficacy had significant sequential mediation effects between media conflict information exposure and defensive medical behavior. This study revealed the differential psychological mechanisms behind the impact of interpersonal and media exposure to doctor-patient conflict information on doctors’ defensive medical behavior. 

为了探究医生群体医患冲突信息接触与防御性医疗行为的关系及其心理机制, 基于拓展平行过程模型(EPPM), 调查我国各级医院216例医生人际和媒体渠道的医患冲突信息接触, 对其医患冲突感知严重性、易感性、自我效能、反应效能、恐惧情绪以及防御性医疗行为的影响。使用SmartPLS 4.1, 利用偏最小二乘结构方程模型(PLS-SEM)进行数据分析和模型检验。结果显示, 人际医患冲突信息接触与感知易感性正相关, 与感知自我效能负相关。媒体医患冲突信息接触分别与感知严重性和易感性正相关, 与感知自我效能负相关。感知严重性和易感性分别对恐惧具有正向预测作用。感知自我效能和反应效能分别与恐惧负相关, 且恐惧能够正向预测防御性医疗行为。中介效应分析结果显示, 感知易感性和自我效能分别与恐惧在人际医患冲突信息接触和防御性医疗行为之间的关系中存在显著的序列中介作用。感知严重性、易感性以及自我效能分别与恐惧在媒体医患冲突信息接触和防御性医疗行为之间的关系中存在显著的序列中介作用。研究结果揭示了人际和媒体医患冲突信息接触对医生群体防御性医疗行为背后心理转化的差异性机制。