无意识目标追求的行为特征、机制及影响因素

无意识目标追求是指个体自动地追求由情境线索激活的目标, 而全然不知目标对自己行为的导向作用。无意识目标追求具有灵活性、抑制性和坚持性。无意识目标追求经由行动的无意识准备和目标价值的自动评估与努力过程实现。积极情绪、内隐态度和人际关系影响无意识目标追求。未来研究需要进一步探讨无意识目标追求的影响因素, 完善无意识目标追求的机制, 探究无意识目标追求结果对个体心理和行为的影响, 提高研究结果的生态效度, 拓展应用研究。     

Psychophysics of Remembering: The Discrimination Hypothesis

In a psychophysical approach to remembering, the events to be remembered are discriminated from other possibilities at the time of remembering, and not at the time of encoding or learning. The discrimination is specific to the retention interval at which remembering occurs, as shown by experiments demonstrating that discriminability and response bias are delay–specific. This article discusses a discrimination model for remembering that emphasizes the individual's history of learning about reward payoffs in similar experiences in the past. This model predicts the two characteristics of forgetting functions, initial discriminability and rate of forgetting.     

The impact of post-migration stressors on refugees’ emotional distress and health: A longitudinal analysis

Refugees often experience poor physical and mental health outcomes following resettlement. These outcomes have been linked to the conditions that are experienced by refugees in the post-migration context, but little is known about the mechanisms by which these conditions influence health. We therefore conducted secondary analyses of the Survey of New Refugees, a large longitudinal study commissioned by the UK Home Office with data collected at four time points spanning 21 months. Refugees’ experience of emotional distress such as feeling stressed, worried, and depressed fully mediated the relationship between post-migration stressors and longitudinal general health. There was no evidence that perceived social support influenced this relationship. These findings suggest that emotional distress contributes to poor health outcomes among refugees and thus that interventions might target emotional distress.     

Delay discounting of monetary gains and losses in adolescents with ADHD: Contribution of delay aversion to choice

Adolescents with attention-deficit/hyperactivity disorder (ADHD) are known to have stronger preferences for smaller immediate rewards over larger delayed rewards in delay discounting tasks than their peers, which has been argued to reflect delay aversion. Here, participants performed a delay discounting task with gains and losses. In this latter condition, participants were asked whether they were willing to wait in order to lose less money. Following the core assumption of the delay aversion model that individuals with ADHD have a general aversion to delay, one would predict adolescents with ADHD to avoid waiting in both conditions. Adolescents (12–17 years) with ADHD (n = 29) and controls (n = 28) made choices between smaller immediate and larger delayed gains, and between larger immediate and smaller delayed losses. All delays (5–25 s) and gains/losses (2–10 cents) were experienced. In addition to an area under the curve approach, a mixed-model analysis was conducted to disentangle the contributions of delay duration and immediate gain/delayed loss amount to choice. The ADHD group chose the immediate option more often than controls in the gain condition, but not in the loss condition. The contribution of delay duration to immediate choices was stronger for the ADHD group than the control group in the gain condition only. In addition, the ADHD group scored higher on self-reported delay aversion, and delay aversion was associated with delay sensitivity in the gain condition, but not in the loss condition. In sum, we found no clear evidence for a general aversion to delay in adolescents with ADHD.     

心理韧性及其神经机制：来自非人类动物模型的证据

心理韧性是指个体对不幸、逆境或挫折等压力情形的有效适应。以非人类动物为模型的心理韧性研究一般改称心理韧性为“抗逆力”, 本文也将沿用“抗逆力”来区分不同物种的韧性研究。近年来采用非人类动物模型对抗逆力神经机制的探索取得了重要进展, 内侧前额叶、海马、奖赏环路等脑区及其投射均参与调控抗逆力的表现, 操控其神经环路的影响与所面对的压力形式有关, 并且高抗动物拥有特异性适应机制。鉴于人类研究的伦理及实验手段等原因, 抗逆力的研究将为人类的韧性研究提供重要参考。     

努力：成本还是奖赏?

努力(Effort)与奖赏系统关系密切。当前关于努力在奖赏加工中的作用存在两个截然相反的观点：努力是一种成本还是一种奖赏?理论模型包括：其一, 努力是一种成本, 会降低奖赏的价值, 相应的理论解释包括内部成本模型、机会成本模型及信号模型等; 其二, 努力能够提升奖赏的价值, 相应的理论解释包括认知失调和努力的合理化模型、习得性勤奋理论及认知需求理论等。这两种观点均得到了来自于动物学、行为学、电生理学以及神经影像学等证据的支持。未来研究需要对努力准确定义, 从时间进程角度对努力的理论进行整合, 进一步考察努力的相关影响因素。     

人脑眶额皮质表征奖赏信息的进展

文章围绕人脑眶额皮质在表征奖赏信息上的核心作用展开,分别从人脑眶额皮质表征奖赏信息的共同神经表征和特异性神经表征特点,奖赏加工和该脑区局部形态特征之间的关系以及眶额皮质表征奖赏信息的时间动态性等角度对最近的重要研究进展进行了一定的梳理和概括。最后,文章讨论了未来研究需要解决的由奖赏类型多样性和脑区间奖赏信息整合复杂性带来的系列问题。     

金钱惩罚促进Stroop任务中的行为表现

本研究通过Stroop任务和修改版MIDT相结合,目的是考察不同额度金钱惩罚对Stroop任务行为表现的影响。结果发现：（1）无论是中性试次,一致试次还是不一致试次,金钱惩罚不仅减少了被试的行为反应时,而且提高了正确率;（2）非惩罚条件与惩罚条件下的冲突效应以及其他不同额度惩罚条件下的冲突效应差异不显著;（3）金钱惩罚对不一致试次反应时的影响与个体的惩罚敏感性呈显著负相关,而与奖赏敏感性无关。结果表明,金钱惩罚能够促进个体的一般行为表现,但是不会提高冲突抑制能力。同时,金钱惩罚对认知行为的影响与其惩罚敏感性密切相关。     

Posttraumatic Stress Disorder and executive dysfunction among children and adolescents: A Latent Profile Analysis

Background/ObjectiveThe current study aimed to examine the relationship between Posttraumatic Stress Disorder (PTSD) symptoms and executive dysfunction in children and adolescents after psychological trauma.MethodParticipants were 13,438 of children and adolescents aged 6 to 18 years exposed to the 2008 Wenchuan earthquake. PTSD and dysexecutive symptoms were assessed using the UCLA PTSD Reaction Index for Children and the Self-Report Dysexecutive Questionnaire. Latent Profile Analysis (LPA) was conducted using Mplus version 7.4. Subgroup differences in trauma exposure and quality of life were calculated using ANCOVA.ResultsA 4-class parallel model was found to best describe latent PTSD symptom profiles and executive dysfunction. Individuals in higher symptom groups showed more trauma exposure and lower quality of life.ConclusionsThis LPA study shed light on the relationship between PTSD and executive dysfunction symptoms in children and adolescents. The correlation between PTSD and executive dysfunction was maintained after individual differences were taken into consideration. Our findings provide a new view on how PTSD relates to executive dysfunction and several suggestions for treating child and adolescent PTSD patients.     

Predictive factors of quality of life in acquired brain injury

Background/ObjectiveThe sequelae and the disability and dependence that follow an acquired brain injury (ABI) may result in a significant reduction in the quality of life (QoL) of those affected. The objective was to assess the QoL of a sample of Spanish patients with an ABI and analyze the influence of certain sociodemographic and injury-related variables on their QoL. Method: The sample comprised 421 adults (60% male; M_age = 53.12; SD = 14.87). Professionals and relatives assessed the patients’ QoL through the CAVIDACE scale, an ABI-specific tool based on the eight-domain QoL model. Results: Univariate analyses showed statistically significant differences in the QoL scores in several sociodemographic (age, civil status, education level, prior employment status, type of home, level of supports, loss of legal capacity, recognized dependence, and degree of dependence) and injury-related (time since the injury, location of the injury, and presence of post-traumatic amnesia) variables. The multiple linear regression showed that loss of legal capacity, time since the injury, prior employment status, location of the injury, and degree of dependence were significant QoL predictors. Conclusions: These findings provide knowledge for the development of programs aimed at reducing the negative impact of ABI on QoL.