视觉和听觉通道下减法与乘法心算加工的ERP特征

研究加工通道的差异以及减法和乘法心算的编码特征,选择100道心算算式,在视觉和听觉两种输入通道下记录并分析了14例正常人的脑事件相关电位(ERP)。结果发现,视觉和听觉通道引发了趋势相反的早中期成分,在额区和中央区产生了显著分离。在慢波阶段,听觉通道下更多激活了颞区,而视觉通道下更多激活了顶-枕区,且慢电位的ERP特征也表现出通道差异。减法和乘法运算以左半球激活为主,但听觉通道下的顶区和颞区出现了显著的右半球优势。减法在视觉通道下优势较大,说明其主要依赖视空间表征;而乘法在听觉通道下更具优势,则主要是由于其以听觉的言语表征方式为主。     

辩证思维与辩证情绪的因果关系探究

辩证情绪是指个体对同一刺激同时体验到积极和消极情绪的一种心理状态.为探索辩证思维和辩证情绪的因果关系,在研究1中首先收集和筛选了诱发辩证情绪的视频;在研究2中,选取219个被试,先通过思维启动改变被试的辩证思维程度,然后考察辩证思维程度的改变对随后诱发辩证情绪强度的影响.结果发现,思维启动(辩证思维和线性思维)引起的辩证思维程度的差异显著,辩证情绪诱发效果显著,辩证思维在启动类型和辩证情绪之间的中介作用显著.这揭示了辩证思维程度的改变确实引起随后诱发的辩证情绪强度的变化,即辩证思维和辩证情绪存在因果关系.     

单侧化准备电位启始时间点的测算:刀切法*

刀切法是统计学家Quenouille提出的一种参数估计方法,由Miller等在1998年首次将刀切法应用在单侧化准备电位(LRP)启始时间点(onset)的测量中。相对于以往单个被试法而言,它是较新的一种统计方法。本文综述了刀切法的统计原理和基本使用过程,并和单个被试法进行了差异比较,最后对这一方法的发展趋势做了展望。     

Transitive inference of social dominance by human infants

It is surprising that there are inconsistent findings of transitive inference (TI) in young infants given that non‐linguistic species succeed on TI tests. To conclusively test for TI in infants, we developed a task within the social domain, with which infants are known to show sophistication. We familiarized 10‐ to 13‐month‐olds (M = 11.53 months) to a video of two dominance interactions between three puppets (bear > elephant; hippo > bear) consistent with a dominance hierarchy (hippo > bear > elephant; where ‘>’ denotes greater dominance). Infants then viewed interactions between the two puppets that had not interacted during familiarization. These interactions were either congruent (hippo > elephant) or incongruent (elephant > hippo) with the inferred hierarchy. Consistent with TI, infants looked longer to incongruent than congruent displays. Control conditions ruled out the possibility that infants’ expectations were based on stable behaviors specific to individual puppets rather than their inferred transitive dominance relations. We suggest that TI may be supported by phylogenetically ancient mechanisms of ordinal representation and visuospatial processing that come online early in human development.     

Mechanisms for attentional modulation by threatening emotions of fear,anger, and disgust

Appropriately attending to threatening environmental stimuli is evolutionarily adaptive and crucial for survival. This study revealed that nonconscious attentional modulation of disgust has different behavioral and event-related potential (ERP) patterns, as compared to fear and anger. To facilitate its evolutionary purpose of avoidance, disgust first diverts rather than attracts attention. Accordingly, the N1 was smaller in a validly than in an invalidly disgust-cued condition. Furthermore, the frontal P3a for disgust, anger, and fear was found to be larger in the valid than in the invalid condition, which was interpreted as an involuntary switching of attention toward threat-related events to mobilize cognitive resources for action or defense. On the contrary, the parietal P3b only occurred at the conscious level; the enhanced P3b indicated that more cognitive resources were being allocated toward the task-relevant but previously less attended location, to ensure the effective achievement of task goals. In addition, group comparisons between individuals with low and high disgust sensitivity showed that the ERP differences between the disgust and the anger/fear conditions at the unconscious level may be attributed only to individuals with high disgust sensitivity. These findings, together with previous knowledge of the effects of fear and anger on attention, strengthen our confidence in the two-stage scheme of attentional modulation by threats, which consists of an early stage of bottom-up response scaling of sensory processing (reflected by the P1 and N1) and a later stage of top-down integration and regulation of emotion and behavior (reflected by the P3).     

认知资源对内隐自杀态度的影响:内控自杀动机的调节作用

旨在探讨大学生的内控自杀动机在认知资源与内隐自杀态度的关系中是否存在调节作用。研究发现,内控自杀动机低自我决定的大学生内隐层面对自杀的赞同程度在有认知资源时要显著低于无认知资源时,而高自我决定的大学生在有或无认知资源时内隐层面对自杀的赞同程度无差异显著。说明内控自杀动机在认知资源与内隐自杀态度的关系中具有显著的调节作用。     

父母婚姻质量对青少年行为的影响:父母教养能力感的中介作用

以160个家庭中的父亲和母亲为被试,采用问卷法,由父亲和母亲分别报告自己感知的婚姻质量、教养能力感、青少年的亲社会和问题行为,以探讨父母婚姻质量对青少年亲社会、问题行为的影响,并检验教养能力满意度和效能感的中介作用。结果发现:(1)父亲和母亲报告的婚姻质量越好,青少年表现出的亲社会行为越多,问题行为越少;(2)父亲的教养能力满意度在父亲报告的婚姻质量与青少年问题行为的关系中具有部分中介作用;(3)母亲的教养能力效能感在母亲婚姻质量对青少年亲社会、问题行为的影响中起部分中介作用;另外,母亲的教养能力满意度在母亲婚姻质量和青少年问题行为之间的中介效应为边缘显著。     

The effects of task instructor status on prospective memory performance in preschoolers

The present study applied a 2 × 2 experimental design to assess prospective memory (PM) development across preschool age and to examine the effect of task instructor status (researcher vs. significant other) on PM performance in 80 preschool children. Participants were required to name pictures (ongoing task [OT]), and to remember to refrain from naming but instead give a different response to certain target cues (PM task). Although the OT was of comparable difficulty for both age groups (as indicated by no performance differences), results still indicated significantly higher PM performance in 5-year-olds than in 3-year-olds, confirming the age-related increase of PM capacities between 3 and 5 years. Furthermore, results showed a performance-enhancing effect of significant others as task instructors on both age-groups. Post-hoc analysis revealed that 3-year-olds instructed by a significant other still performed marginally worse than 5-year-olds instructed by a researcher, underlining the finding that substantial changes of PM capacities take place during early childhood.     

The Selection of Freebies and the Preference for Freebie Promotions—A Perspective on Item Characteristics

Research on consumer decision making has mainly focused on individual products; however, many products are purchased with other items as part of a promotional package. This paper explores how the characteristics (hedonic versus utilitarian) of the items in freebie promotional packages (e.g., buy one item and get a different item for free) influence consumers' preference for the promotional package. Additionally, the authors examine how the characteristics of the focal item influence consumers' choice of either a hedonic or a utilitarian freebie item. Five experiments, rooted in the concepts of consumer avoidance of overloading negative emotions and motivation to seek hedonic pleasure, show that a package with one utilitarian and one hedonic item generates higher purchase intentions and willingness to pay than a package with either two hedonic or two utilitarian items. Furthermore, consumers who purchase a hedonic (utilitarian) focal item are more likely to choose a utilitarian (hedonic) freebie. These effects exist not only in hypothetical scenarios but also in an incentive‐compatible design. Moreover, the impact of the focal item characteristics on consumer choice of freebie is moderated by acquisition format and time separation. The authors also explore the internal mechanism influencing consumers' freebie choices. The findings have significant implications for both theory and practice. Copyright © 2016 John Wiley & Sons, Ltd.     

Shared leadership and team effectiveness: The examination of LMX differentiation and servant leadership on the emergence and consequences of shared leadership

This study examined the effects of leader–member exchange (LMX) differentiation on team-shared leadership and team effectiveness. Drawing on the group engagement model, we suggested that LMX differentiation negatively affects team-shared leadership and team effectiveness (i.e., team performance and team organizational citizenship behavior [OCB]). Servant leadership weakens the negative effects of LMX differentiation on shared leadership. We tested our predictions using data from a sample of 336 salespersons nested in 110 sales teams in China. We found that shared leadership mediated the relationships between LMX differentiation with both team performance and team OCB. In addition, servant leadership moderated the relationship between LMX differentiation and shared leadership and the indirect relationship between LMX differentiation with both team performance and team OCB.