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1. chinaXiv:202102.00023 [pdf]

工作记忆表征精度加工需求对注意引导的影响

车晓玮; 徐慧云; 王凯旋; 张倩; 李寿欣
Subjects: Psychology >> Experimental Psychology

采用注意捕获范式,通过行为和事件相关脑电位(ERP)实验,探讨工作记忆表征精度加工需求对注意引导的影响,行为结果发现,在低精度加工需求条件下,只有一个工作记忆表征引导注意,且处于高激活状态的工作记忆表征产生的注意捕获大于低激活状态;而在高精度加工需求条件下,有两个工作记忆表征引导注意,且处于高、低激活状态的工作记忆表征产生的注意捕获没有差异。ERP结果显示,高精度加工需求条件下诱发的NSW和LPC大于低精度加工需求条件;在高精度加工需求条件下,干扰项与记忆项匹配比不匹配时,诱发更大的N2和更小的N2pc,而在低精度加工需求条件下,干扰项与记忆项匹配和不匹配时诱发的N2、N2pc没有差异。研究表明,工作记忆表征精度加工需求影响注意引导的机制可能是高精度加工需求下,工作记忆表征消耗的认知资源增加,搜索目标获得的资源减少,干扰项捕获的注意增加。

submitted time 2021-02-09 Hits475Downloads211 Comment 0

2. chinaXiv:202102.00031 [pdf]

Dialectical thinking is linked with smaller bilateral nucleus accumbens and right amygdala: the mediating role of sensitivity to reward

Huixian Li; Xiaomeng Hu
Subjects: Psychology >> Physiological Psychology

Our current work examined the interface of thinking style and mental health at both behavioral and neuropsychological levels which describe a predisposition to psychopathology. Thirty-nine Chinese participants were divided into high and low holistic thinkers based on the triad task scores, completed the Sensitivity to Punishment and Sensitivity to Reward Questionnaire (SPSRQ), and performed structural and resting-state functional magnetic resonance imaging. We found that high holistic thinkers were much less sensitive to reward than low holistic thinkers. Furthermore, their bilateral nucleus accumbens and right amygdala volumes were smaller than those of low holistic thinkers. Our integrated results showed that the relationship between holistic thinking tendency and the amygdala volume was mediated by the nucleus accumbens and the sensitivity to reward. Finally, resting-state functional connectivity results showed increased FC between left nucleus accumbens and bilateral amygdala in high holistic thinkers. The present synthetical results suggest that dialectical thinking may lead to better mental health outcomes.

submitted time 2021-02-09 Hits330Downloads158 Comment 0

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