临床疼痛患者疼痛注意偏向模式——来自漂移扩散模型的证据

Pain-Related Attentional Bias in Patients with Clinical Pain—Evidence from the Drift Diffusion Model

摘要: 疼痛注意偏向可能参与临床疼痛维持，但传统反应时指标难以区分其潜在认知成分。本研究采用点探测任务结合漂移扩散模型，考察临床疼痛患者对疼痛词语的注意加工。结果显示，疼痛组和对照组在反应时上均表现出疼痛注意解除困难；前者在目标重定向中准确性下降。漂移扩散模型结果显示，疼痛组漂移率升高、非决策时间缩短、决策阈限升高，提示其疼痛线索加工增强且决策更谨慎。本研究为理解临床疼痛影响注意加工提供了计算行为证据。

Abstract: Pain-related attentional bias may contribute to the maintenance and development of clinical pain. However, traditional reaction time measures are limited in dissociating the latent cognitive components underlying such bias. This study combined a dot-probe task with the drift diffusion model (DDM) to examine how patients with clinical pain process pain-related words. Reaction time results showed that both patients with clinical pain and healthy controls exhibited difficulty disengaging attention from pain-related information. Accuracy results further showed that the pain group exhibited reduced response accuracy during attentional disengagement and target reorientation. DDM results revealed that patients with clinical pain showed increased drift rate, shortened non-decision time, and increased decision threshold, suggesting enhanced pain-cue processing and attentional orienting, accompanied by a more cautious decision strategy. This study provides computational behavioral evidence for understanding how clinical pain affects attentional processing.