印象形成中社会知觉信息效价冲突的认知控制效应

当个体信息与类别信息同时呈现时,个体的自我控制资源与信息效价产生交互作用,且共同影响他人印象形成的认知控制策略和信息加工深度。为进一步探究这一现象所产生的印象控制效应,采用自我控制资源损耗任务将96名被试随机分为高损耗组和低损耗组,并让他们完成内隐联想测验,以考察个体信息与类别信息的效价冲突时,他人印象控制策略如何受到自我控制资源与信息效价的双重影响。结果发现:(1)个体信息与类别信息的印象控制依赖于自我控制资源。(2)自我控制资源损耗与信息效价类型存在显著的交互作用。当个体损耗了较多的自我控制资源后,对效价冲突的个体信息与类别信息进行印象加工时,消极刻板印象的激活因受到这两类效价冲突信息的限制,只能依赖实时更新的面部表情信息,从而形成自下而上的反应性控制; 当个体损耗的自我控制资源较少时,对同样的个体信息与类别信息,不论效价相容或冲突,均能保持对消极刻板印象的自动激活,从而导致自上而下的主动性控制。     

情绪记忆增强效应的时间依赖性

探讨情绪记忆短时和长时增强效应相对特异性机制以及唤醒度和效价在情绪记忆中的作用。运用不同阶段提取和不同情绪类别相结合的多因素设计方法, 对20位正常年轻成人进行行为学检测。结果显示, 情绪对记忆加工不同阶段(短时和长时)的调节作用(增强效应)具有时间依赖性, 且主要取决于情绪唤醒度, 而无显著正负效价性差异。在短时阶段主要涉及高唤醒度的增强; 而长时阶段涉及不同水平唤醒度的增强, 不同唤醒度的增强效应存在相对分离。     

人类对情绪事件效价强度的易感性及神经机制

人类情绪无疑有强度的差异。然而, 长期以来人类情绪强度的易感性未能引起足够关注。通过系统操纵刺激材料的效价强度, 作者及研究团队分别从情绪易感性本身, 情绪影响高级认知, 以及个体差异三个层次系统探讨了人类对情绪事件效价强度的易感性及其神经机制。结果发现：1)、相比正性刺激, 人类对负性刺激的效价强度更敏感, 这一效应可能跟右侧海马/杏仁核的警觉功能有关联。2)、与上述结果相一致, 不同效价强度的负性情绪对新异性加工、目标觉察、执行控制等高级认知过程具有显著不同的影响。3)、人类情绪强度的易感性具有显著个体差异：相比男性, 女性对轻度负性情绪事件易感性更强。相比中向人群, 外倾人群对愉悦刺激的情绪易感性更强, 而对轻度负性事件的情绪易感性更弱。     

情绪效价及强度对词汇加工的影响

以46名大学生为被试,以不同词性（名词&动词）的汉语双字正性情绪词、负性情绪词、中性词作为刺激材料,考察情绪效价强度（极端、中等、中性）对词性判断加工的影响。结果表明：（1）动词的词性判断比名词难,且该难度会受到高强度情绪信息的影响而扩大。（2）情绪效价及强度对名词加工的影响表现在两个方面：极端正性情绪易化对名词的加工,增强名词加工的优势效应;而中等和极端负性情绪干扰对名词的词性判断,削弱名词加工的优势效应。（3）除了受到性别、性格等因素的影响外,情绪效价强度效应的具体表现还受刺激类型的调制。     

Effects of valence and framing in decision-making: Assessing decision-makers' perceived domains of choice

Abstract: In comparison between choice alternatives, judgments of “How much better is a preferred option?” and “How much worse is a less preferred option?” may differ in their magnitudes. Such discrepancies are called “valence effects”. Previously, Yamagishi and Miyamoto (1996 ) observed systematic positive valence effects (“Better” exceeding “Worse”) in the domain of gains and systematic negative valence effects (“Worse” exceeding “Better”) in the domain of losses. The current experiments used the directions of valence effects as a tool to assess decision‐maker's interpretation of choice tasks under “framing effects” ( Tversky & Kahneman, 1986 ). Preferences under the framing effect switch from certain options in the domain of gains to uncertain options in the domain of losses. Two experiments showed that preferences for certain options were associated with positive valence effects, whereas preferences for uncertain options were associated with negative valence effects. Moreover, conditions wherein the framing manipulations lose the effectiveness were examined. Valence effects showed that framing effects ceased to occur when decision‐makers maintained consistent domain perceptions as pertaining to gains or to losses, across the domains of gains and losses. Implications are discussed.     

评论效价、新产品类型与调节定向对在线评论有用性的影响

对于新产品推出的成功与否, 较早采用者的评论和建议的影响相当巨大, 本研究通过两个实验研究评论效价(正面评论/负面评论)、新产品类型(渐进性新产品/革新性新产品)和调节定向(促进定向/防御定向)对新产品在线评论有用性的影响。实验1设计为2(新产品类型：渐进性新产品/革新性新产品)×2(评论效价：正面/负面)的组间操控设计, 结果表明：相对于渐进性新产品, 负面评论对革新性新产品的有用性更高, 正面评论对渐进性新产品和革新性新产品的有用性差异不显著。实验2设计为2(新产品类型：渐进性新产品/革新性新产品)×2(评论效价：正面/负面)×2(调节定向：促进/防御)的组间操控设计, 结果表明：促进定向的个体认为正负面评论有用性差异不大, 而防御定向的个体认为负面评论有用性显著高于正面评论; 对于促进定向的个体来说, 新产品类型对于评论效价对评论有用性的影响有调节作用, 而对于防御定向的个体来说, 新产品类型的这种调节作用则不存在。     

Can emotional content reduce the age gap in visual working memory? Evidence from two tasks

Ageing is associated with declines in several cognitive abilities including working memory (WM). The goal of the present study was to assess whether emotional information could reduce the age gap in the quantity and quality (precision) of representations in visual WM. Young and older adults completed a serial image recognition (SIR) task and a colour-image binding (CIB) task. Results of the SIR task showed worse performance for negative than neutral and positive images within the older group, hence enlarging the age gap in WM. In the CIB task, recall precision was lower in the old than young adults, showing an ageing decline in the quality of WM representations. Positive images tended to improve precision, but this boost was similar for both age groups. In sum, emotional content did not reduce the age gap in visual WM.     

Local context effects during emotional item directed forgetting in younger and older adults

This paper explored the differential sensitivity young and older adults exhibit to the local context of items entering memory. We examined trial-to-trial performance during an item directed forgetting task for positive, negative, and neutral (or baseline) words each cued as either to-be-remembered (TBR) or to-be-forgotten (TBF). This allowed us to focus on how variations in emotional valence (independent of arousal) and instruction (TBR vs. TBF) of the previous item (trial n-1) impacted memory for the current item (trial n) during encoding. Different from research showing impairing effects of emotional arousal, both age groups showed a memorial boost for stimuli when preceded by items high in positive or negative valence relative to those preceded by neutral items. This advantage was particularly prominent for neutral trial n items that followed emotional items suggesting that, regardless of age, neutral memories may be strengthened by a local context that is high in valence. A trending age difference also emerged with older adults showing greater sensitivity when encoding instructions changed between trial n-1 and n. Results are discussed in light of age-related theories of cognitive and emotional processing, highlighting the need to consider the dynamic, moment-to-moment fluctuations of these systems.     

The effects of emotion on younger and older adults’ monitoring of learning

Age-related differences in memory monitoring appear when people learn emotional words. Namely, younger adults’ judgments of learning (JOLs) are higher for positive than neutral words, whereas older adults’ JOLs do not discriminate between positive versus neutral words. In two experiments, we evaluated whether this age-related difference extends to learning positive versus neutral pictures. We also evaluated the contribution of two dimensions of emotion that may impact younger and older adults’ JOLs: valence and arousal. Younger and older adults studied pictures that were positive or neutral and either high or low in arousal. Participants made immediate JOLs and completed memory tests. In both experiments, the magnitude of older adults’ JOLs was influenced by emotion, and both younger and older adults demonstrated an emotional salience effect on JOLs. As important, the magnitude of participants’ JOLs was influenced by valence, and not arousal. Emotional salience effects were also evident on participants’ free recall, and older adults recalled as many pictures as did younger adults. Taken together, these data suggest that older adults do not have a monitoring deficit when learning positive (vs. neutral) pictures and that emotional salience effects on younger and older adults’ JOLs are produced more by valence than by arousal.     

水平空间与情绪效价联结效应的产生机制

采用词汇效价判断任务,考察水平空间与情绪效价联合效应的产生机制。实验1在被试双手正常放置条件下考察了词汇效价与水平空间联结效应的存在;实验2则要求被试双手交叉放置,以考察当反应手和反应键的空间信息冲突时水平空间与情感效价的关联现象;实验3则进一步考排除反应手的参与,以考察口头报告的反应方式是否对两者的联结效应产生影响。结果表明,不同反应方式下均存在空间情感效价的联结,且此联结更多是反应选择极性编码的结果。