Jones Rhiannon, Bhattacharya Joydeep
Department of Psychology, Goldsmiths, University of London, London SE14 6NW, UK ; Department of Psychology, University of Winchester, Winchester SO22 4NR, UK.
Department of Psychology, Goldsmiths, University of London, London SE14 6NW, UK.
Neuroimage Clin. 2013 Nov 28;4:112-21. doi: 10.1016/j.nicl.2013.11.008. eCollection 2014.
Likelihood thought-action fusion (TAF-L) refers to a cognitive bias in which individuals believe that the mere thought of a negative event increases its likelihood of occurring in reality. TAF-L is most commonly associated with obsessive-compulsive disorder (OCD) but is also present in depression, generalized anxiety disorder and psychosis. We induced TAF-L in individuals with high (High-OC, N = 23) and low (Low-OC, N = 24) levels of OC traits, and used low resolution electromagnetic tomography (LORETA) to localise the accompanying electrical brain activity patterns. The results showed greater TAF-L in the High-OC than in the Low-OC group (p < .005), which was accompanied by significantly greater upper beta frequency (19-30 Hz) activity in the precuneus (p < .05). Further, the precuneus activity was positively correlated with self-reported magnitude of TAF-L (p < .01), suggesting a specific role of this region in this cognitive bias. Results are discussed with reference to self-referential processing and the default-mode network.
可能性思维-行动融合（TAF-L）是指一种认知偏差，即个体认为仅仅想到一个负面事件就会增加其在现实中发生的可能性。TAF-L最常与强迫症（OCD）相关，但在抑郁症、广泛性焦虑症和精神病中也存在。我们在具有高（高强迫倾向，N = 23）和低（低强迫倾向，N = 24）强迫特质水平的个体中诱发TAF-L，并使用低分辨率电磁断层扫描（LORETA）来定位伴随的脑电活动模式。结果显示，高强迫倾向组的TAF-L高于低强迫倾向组（p <.005），同时楔前叶的上β频率（19 - 30 Hz）活动显著增强（p <.05）。此外，楔前叶活动与自我报告的TAF-L程度呈正相关（p <.01），表明该区域在这种认知偏差中具有特定作用。我们结合自我参照加工和默认模式网络对结果进行了讨论。
