Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Moral cognition focuses on the processing of information underlying the moral behavior. Recently, researchers have begun to apply computational modelling to moral cognition as to explore how moral cognition is represented in the brain. However, the research on the computational modeling of moral cognition is still at its infancy. The application of computational modelling (the Drift Diffusion Models, Utility Models, Reinforcement Learning Models and Hierarchical Gaussian Filter) in the behavioral and physiological studies of moral cognition quantified the cognitive processes and neural mechanisms underlying moral decision-making, moral judgment, and moral inference. In addition, this new approach could help to understand antisocial behavior and mental disorders. Finally, the computational modeling needs to be improved and future research need to pay attention to the potential limitations.
Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Testosterone is an androgen synthesized and secreted by the Leydig cells of the testes in men, the thecal cells of the ovaries and placenta of women. It can mediate various physiological, morphological, and behavioral processes, and is vital to human survival and reproduction. A large number of studies have shown that there is a bidirectional relationship between testosterone and social behavior. Testosterone can regulate various social behaviors, which in turn feedback and affect the testosterone level. Early research showed that individuals with high testosterone level are more aggressive. According to the challenge hypothesis and the biosocial status model, recent studies have revealed that testosterone is highly responsive to competitive interactions. In addition, by reviewing these studies, we suggest that changes in testosterone can affect aggressive behavior by enhancing the reactivity of the amygdala or reducing PFC-amygdala functional coupling. Future research could consider the potential role of other hormones (such as cortisol) and personality traits in regulating the relationship between testosterone and human aggressive behavior, as well as related biological mechanisms.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Cooperation is a prosocial behavior that develops along with human social development. Cooperation involves brain activation of the reward system and enables people to form cooperative relationships so to pursuit social rewards and self-affirmation. Previous studies have shown that depressed patients have severe social dysfunctions, e.g., they have reduced willingness to cooperate and exhibited increased negative emotions during cooperation. This study employed the prisoner's dilemma game (PDG) to investigate the effect of depression on social cooperation using functional near-infrared spectroscopy (fNIRS) hyperscanning technique. A total of 156 participants were screened using Beck Depression Inventory Second Edition and allocated into three paired groups, i.e., low - low depressive tendency pairs (n = 26), low - high depressive tendency pairs (n = 26), and high - high depressive tendency pairs (n = 26). The fNIRS optrodes were placed at frontal and right temporoparietal junction of two participants, with 29 channels in each participant. Behavioral and self-reported emotion ratings showed that compared to participants with low depressive tendency, the high depressive tendency group were less cooperative and less satisfied with their partner during the prisoner's dilemma task. The brain imaging results showed that, first, the orbitofrontal cortex (OFC) was activated most significantly in the reciprocal cooperation condition, followed by the condition with self defection but opponent cooperation. Furthermore, the significantly increased neural activation in these two conditions could only be observed in the low depressive tendency group. This finding suggests that people with high depressive tendency have deficits in reward processing, especially for social reward processing. Second, the neural activation of bilateral dorsolateral prefrontal cortex (dlPFC) in participants with high depressive tendency was significantly weaker than that in participants with low depressive tendency. Depressive tendency had a significant modulation effect on inter-brain synchronization of the right dlPFC, i.e., the enhanced inter-brain synchronization induced by reciprocal cooperation could not be observed in participants with high depressive tendency. Third, the right temporoparietal junction (TPJ) inter-brain synchronization in the low-low depressive tendency group was higher than that in the high-high and high-low depressive tendency groups. Furthermore, this effect was significant only if both participants in the PDG made the same choice (both cooperation or both defection). The result of this study suggests that depressive population have dysfunctions in the brain regions involved in social reward processing (reflected by the OFC), conflict control (the dlPFC) and theory of mind (the right TPJ). Our findings provide experimental evidence to help understand the brain mechanism of decreased cooperation in depressed individuals, which further lays a foundation to improve social functions in depressed patients in clinical practice.
Subjects: Psychology >> Other Disciplines of Psychology submitted time 2018-09-13 Cooperative journals: 《心理学报》
Abstract：情绪记忆增强效应在负性情绪记忆研究中被反复证实。尽管厌恶和恐惧同属负性情绪, 提示威胁的存在, 但由于它们的进化意义和生理功能不同, 可能导致它们对记忆的编码、保持、提取三个阶段不同的调节方向或调节强度。本文采用延迟再认任务, 采用事件相关电位考察健康成年被试对唤醒度和效价相当的恐惧和厌恶面孔的记忆编码、保持和提取。结果显示, 1)在记忆编码的早期, 被试主要加强了对恐惧面孔的注意(P1)和结构编码(N170), 而厌恶信息的加工受到了抑制; 2)从记忆编码晚期到记忆保持的整个阶段, 被试对厌恶信息的精细评估(编码阶段P3)和复述保持(保持阶段的负走向慢波)均强于恐惧信息; 3)相比于恐惧面孔, 厌恶面孔可能在工作记忆系统形成了更强的表征, 从而使被试在记忆提取时可回忆起更多的细节, 对记忆提取的信心更足(提取阶段P3)。这后两条发现是导致行为层面上厌恶情绪记忆优于恐惧情绪记忆的原因。本研究为“厌恶比恐惧具有更强的记忆增强效应”提供了高时间分辨率的脑活动层面的证据, 从而进一步揭示了负性情绪增强记忆的认知机制。
Hits
Hits
Downloads
Comment