内隐记忆和内隐学习的整合研究趋向

内隐记忆和内隐学习代表了人类学习与记忆的无意识机制,它们打开了理解人类无意识奥妙的大门。从内隐记忆和内隐学习的诞生与实验室发展来看,二者似乎长期以来处在相对独立的位置。然而,随着研究的不断深入,走向整合已经成为不可抑制的趋向。该文旨在结合内隐记忆和内隐学习的定义、经验类似性、理论框架和实验研究等方面的证据,论述它们的整合必要以及已有的整合途径,促进研究对学习和记忆的无意识过程的全面把握     

疼痛恐惧对疼痛的影响及其认知机制

疼痛恐惧是把将要出现的疼痛刺激视为主要威胁而产生的一种恐惧,它会影响与疼痛相关的感知觉、注意、回避行为以及安慰剂止痛的效果.疼痛恐惧的认知模型主要有活动回避模型、恐惧-回避模型以及内感受性恐惧条件模型.未来的研究要进一步探究疼痛恐惧的认知机制,完善疼痛恐惧的认知模型并扩展疼痛恐惧的研究方法.     

Testing the role of cognitive inhibition in physical endurance using high-definition transcranial direct current stimulation over the prefrontal cortex

The aim of this study was to clarify the role of the prefrontal cortex (PFC) in physical effort regulation. We hypothesized that the PFC would be progressively involved in physical endurance through the engagement of cognitive inhibition, which would be necessary to maintain effort by inhibiting fatigue-related cues. This hypothesis was examined using a double-blind, sham-controlled, within-subjects study (N = 20) using high-definition (HD) transcranial direct current stimulation (tDCS) over the right dorsolateral prefrontal cortex (dlPFC). Participants had to maintain a knee extensor contraction at 30% of their maximal force while simultaneously performing an Eriksen flanker task to evaluate their inhibition performance during the task. Anodal stimulation of the dlPFC influenced response to the cognitive task during exercise, as seen by slower response times and better accuracy. However, it did not lead to any measureable improvement in cognitive inhibition and did not influence endurance time. There was no correlation between cognitive inhibition and the maintenance of physical effort. This result does not indicate a relationship between cognitive inhibition and endurance performance. The contribution of the PFC in physical endurance could be explained through its involvement on decisional processes.     

Manipulations of distractor frequency do not mitigate emotion-induced blindness

Emotional distractors can impair perception of subsequently presented targets, a phenomenon called emotion-induced blindness. Do emotional distractors lose their power to disrupt perception when appearing with increased frequency, perhaps due to desensitisation or enhanced recruitment of proactive control? Non-emotional tasks, such as the Stroop, have revealed that high frequency distractors or conflict lead to reduced interference, and distractor frequency appears to modulate attentional capture by emotional distractors in spatial attention tasks. But emotion-induced blindness is thought to reflect perceptual competition between targets and emotional distractors, and it is unclear whether high frequency emotional stimuli cause less disruption at this relatively early stage of processing. In four experiments, participants searched streams of images for a rotated target image. A negative or neutral distractor appeared before the target, and their relative frequency was manipulated. Across all experiments, the frequency of emotional distractors did not modulate emotion-induced blindness even when participants were explicitly informed that they would appear often or seldom. Thus, increased distractor frequency does not appear to mitigate the priority allotted to emotional distractors during perceptual competition.     

The vocabulary spurt predicts the emergence of backward semantic inhibition in 18‐month‐old toddlers

The current study examines the relationship between 18‐month‐old toddlers’ vocabulary size and their ability to inhibit attention to no‐longer relevant information using the backward semantic inhibition paradigm. When adults switch attention from one semantic category to another, the former and no‐longer‐relevant semantic category becomes inhibited, and subsequent attention to an item that belongs to the inhibited semantic category is impaired. Here we demonstrate that 18‐month‐olds can inhibit attention to no‐longer relevant semantic categories, but only if they have a relatively large vocabulary. These findings suggest that an increased number of items (word knowledge) in the toddler lexical‐semantic system during the “vocabulary spurt” at 18‐months may be an important driving force behind the emergence of a semantic inhibitory mechanism. Possessing more words in the mental lexicon likely results in the formation of inhibitory links between words, which allow toddlers to select and deselect words and concepts more efficiently. Our findings highlight the role of vocabulary growth in the development of inhibitory processes in the emerging lexical‐semantic system.     

恐惧管理中死亡焦虑不同防御机制之间的关系

根据恐惧管理理论, 个体主要通过世界观、自尊和亲密关系三种防御机制来应对必死性意识引发的死亡焦虑。主流观点认为三种防御机制在防御死亡焦虑时的地位是平等的, 符合“流动补偿机制”。本文讨论了流动补偿机制的局限性, 提出三种防御机制之间关系的新观点: 优先级假设, 认为三种防御机制地位并非平等, 而是存在优先级: 亲密关系优先于世界观和自尊, 世界观优先于自尊。在梳理了支持证据后, 本文尝试从发展性视角对优先级假设提出可能的解释, 认为这种优先级来源于防御机制的发展顺序和衍生关系。     

路径知识习得的认知老化效应

年龄与路径知识习得的关系是空间与认知老化两大领域研究的重要议题。老年人在面对不同的路径学习环境时呈现出不同的认知老化表现。以往与年龄相关的路径知识习得能力变化的研究, 主要支持了认知老化衰退理论。然而近来发现随着年龄增长, 老年人保留了一种空间认知补偿能力。由此, 在对前人文献进行回顾和反思的基础上, 整合路径知识习得的认知老化表现及机制以探究缓解空间认知老化可能的内部因素和外部有效措施。     

敌意归因偏向对反应性攻击的预测及报复动机的中介作用

敌意归因偏向指将模糊情境中他人的行为意图进行敌意归因的倾向,其被认为是导致攻击的主要认知因素,但还缺乏其与反应性、主动性攻击的纵向关系的考察,而且其影响反应性攻击的动力机制也不清楚。本研究通过两个子研究来分别回应这两个问题。研究1的纵向调查结果显示,敌意归因偏向只纵向预测反应性攻击,而不能跨时间地预测主动性攻击。研究2对另一批大学生的横断面调查发现,报复动机可以中介敌意归因偏向与反应性攻击的关系。研究结果提示,敌意归因偏向很可能主要是在反应性攻击的形成中起到重要作用,而对主动性攻击的影响不大,报复动机则很可能是这种作用背后的动力机制之一。