The no, predictable, and unpredictable threat (NPU-threat) task is an experimental paradigm that delineates the anticipation of predictable vs. unpredictable threat. The current literature suggests that heightened defensive motivation in anticipation of unpredictable threat is associated with anxiety disorders and increased symptoms. Few investigations have examined whether a heightened response to actual threat is also associated with anxiety-related phenomenology. The present study examined the relationship between the tactile P300 to shock delivery during the NPU-threat task and individual differences in anxiety symptoms, intolerance of uncertainty, and neuroticism. Overall, the tactile P300 was enhanced in response to unpredictable shocks relative to predictable shocks. Greater tactile P300 enhancement to unpredictable shocks was associated with greater anxiety symptoms, intolerance of uncertainty, and neuroticism. The present study suggests that temporal unpredictability enhances attentional engagement to threat, which is greater in individuals characterized by narrow and broad anxiety constructs.

无，可预测和不可预测的威胁（NPU威胁）任务是一种实验范式，描述了可预测与不可预测的威胁之间的关系。当前的文献表明，在预期到不可预测的威胁时增强的防御动机与焦虑症和症状增加有关。很少有研究检查对实际威胁的增强反应是否也与焦虑相关的现象学有关。本研究检查了在NPU威胁任务期间触觉P300与电击传递之间的关系，以及焦虑症状，不确定性的不耐性和神经质的个体差异。总体而言，相对于可预测的震动，触觉P300增强了对不可预测的震动的响应。P300触觉增强对不可预测的电击的增强与焦虑症状，不确定性的不容忍和神经质有关。本研究表明，时间上的不可预测性增强了注意力对威胁的参与，在以狭窄和广泛的焦虑结构为特征的个体中，这种参与性更大。