积极接触与消极接触对群际关系的影响

群际接触研究中存在的“积极偏向”阻碍了对群际接触的全面认知, 因而, 近年来消极接触开始被纳入研究之列。当前的积极接触和消极接触研究以问卷法为主, 另外还涉及内容分析、社会网络分析以及实验法。积极接触和消极接触分别会提升和恶化群际关系, 群际情绪、群际信任在其中起中介作用, 权威主义、亲密性起调节作用。在积极接触效应和消极接触效应的关系上, 存在不对称性检验和交互作用检验两种研究思路, 并均得到了实证研究证据的支持。未来研究需要进一步考察不同效价接触, 尤其是消极接触的泛化效应, 拓展积极接触和消极接触的效应范围, 完善积极接触和消极接触的作用机制, 并进一步探索影响积极接触和消极接触不对称性效应的因素。     

非亲密关系中的礼物赠予：礼物偏好的不一致

礼物赠予是由于不同的事件和动机,在不同的关系背景中赠予者和接收者的物质和非物质产品交换的过程,具有重要的个人和社会意义。但是诸多研究表明,非亲密关系（非恋爱关系和夫妻关系）的赠予者和接收者在礼物类型偏好、礼物价值偏好及双方关系结果的知觉等方面均存在不一致性。可以从赠予者-接收者的认知差异、动机差异及社会规范的约束差异来解释这一现象,并提出了可供借鉴的礼物赠予策略。未来研究还可以从礼物成败的线索反馈、礼物选择的决策过程、采取更符合现实的研究方法及认知神经科学技术等方面对礼物偏好现象进行深入探究。     

外显和内隐情绪韵律加工的脑机制：近红外成像研究

准确识别言语中的情绪韵律信息对社会交往非常重要。本研究采用功能近红外成像技术, 探索外显和内隐情绪加工条件下愤怒、恐惧、快乐三种情绪韵律加工过程中的大脑皮层神经活动。结果表明, 对愤怒、恐惧、快乐韵律进行特异性加工的脑区分别为左侧额极/眶额叶、右侧缘上回、左侧额下回, 其中右侧缘上回脑区同时受到情绪和任务的调控。此外, 右侧颞中回、颞下回和颞极在情绪外显任务中的激活明显强于内隐任务。本研究的结果部分支持了情绪韵律的层次模型, 也对该模型的第三层次, 即“额区对语音情绪信息的精细加工需要外显性情绪加工任务参与”提出了质疑。     

情绪诱发视盲任务中的情绪注意控制机制：来自脑电ERP和时频分析的证据

采用脑电时频分析技术,对情绪诱发视盲任务中的情绪控制机制进行了分析。实验设置负性图片、中性图片及填充图片三种干扰刺激条件,关注被试正确完成目标识别时的干扰刺激加工过程。实验结果发现,负性与中性干扰刺激在注意加工阶段均较控制性的填充图片条件诱发前额中央分布的theta同步化效应,而且负性刺激所诱发的此效应又较中性情绪刺激更多分布在左侧前额和颞枕部。实验结果表明：（1）情绪诱发视盲任务下被试确实存在对于情绪干扰刺激的自上而下控制;（2）相比中性干扰刺激,负性干扰刺激在EIB中的情绪注意控制机制不仅包括前人所发现的后部颞枕区对刺激识别的注意控制,而且包括前额叶参与下的负性情绪控制。     

Asymmetrical hemisphere activation enhances global–local processing

Decades of research focusing on the neurophysiological underpinnings related to global–local processing of hierarchical stimuli have associated global processing with the right hemisphere and local processing with the left hemisphere. The current experiment sought to expand this research by testing the causal contributions of hemisphere activation to global–local processing. To manipulate hemisphere activation, participants engaged in contralateral hand contractions. Then, EEG activity and attentional scope were measured. Right-hand contractions caused greater relative left-cortical activity than left-hand contractions. Participants were more narrowly focused after left-hemisphere activation than after right-hemisphere activation. Moreover, N1 amplitudes to local targets in the left hemisphere were larger after left-hemisphere activation than after right-hemisphere activation. Consistent with past research investigating hemispheric asymmetry and attentional scope, the current results suggest that manipulating left (right) hemisphere activity enhanced local (global) attentional processing.     

Biomechanical Motor Patterns in Normal Walking

Motor patterns in normal human gait are evident in several biomechanical and EMG analyses over the stride period. Some of these patterns are invariant over the stride period with changes of cadence, while others are closely correlated with speed changes. The findings for slow, natural, and fast walking are summarized: 1. Joint angle patterns over the stride period are quite invariant, and do not change with cadence;

2. Moment of force patterns at the ankle are least variable and quite consistent at all speeds;

3. A recently defined support moment is quite consistent at all speeds.

4. Moments at the knee and hip are highly variable at all cadences but decrease their variability as cadence increases;

5. Mechanical power patterns at all joints show consistent timing over the stride period;

6. EMG profiles of 5 muscles show consistent timing over the stride, but the amplitude increases as walking speed increases.

Arguments are presented to support the concept that walking speed is largely controlled by gain and that the timing of the motor patterns, which is extremely tightly synchronized with the anatomical position, is under major afferent control.     

A New Tactile Illusion: Temporal Limits on the Processing of Spatiotemporal Patterns

A novel illusion was observed when 12 tactile point-stimulators arranged in a circle were sequentially activated so that each quadrant was first traced in a clockwise manner, then counterclockwise, and again in a clockwise manner, after which the next quadrant was similarly traced. Under certain temporal conditions this stimulus pattern was experienced as a point moving through an overall circular path but looping inwardly about once per quadrant. The effects of variations in rate of presentation of such stimuli were investigated by having subjects make drawings of their perceptual experiences. Three skin surfaces were used (palm, fingers, and forearm), and all produced similar results except for lower confidence and reliability of drawings made from forearm stimulation. Pattern presentation rate, however, had a consistent and powerful effect, with the looping illusion most frequently observed at rates around 25 pattern points per s and with different perceptual organizations dominating as rates departed widely from this optimum. The illusory perceptual organizations were interpreted as compromises between past and present stimulation necessitated by the relative slowness of tactile processing of spatio-temporal patterns.     

赢者诅咒：心理机制、影响因素及应对策略

赢者诅咒是指在拍卖情境中, 竞价者为了获得拍卖品会过高估计其价值, 竞价成功以后当他发现其价值和自己之前的期望不一致时所产生的一种“诅咒”心理。赢者诅咒现象普遍存在于企业的资产拍卖、兼并重组、博彩游戏、投资决策等领域。损失规避和过度自信理论是赢者诅咒的主要心理机制, 而其影响因素主要有竞拍商品价值的不确定性、竞价人数、信息因素和竞价经验等。赢者诅咒的应对策略主要包括联合竞标、信息共享和学习。未来对赢者诅咒的研究需要进一步探讨赢者诅咒的心理机制、研究范式及本土化等问题。     

Word learning and phonetic processing in preschool-age children

Consonants and vowels have been shown to play different relative roles in different processes, including retrieving known words from pseudowords during adulthood or simultaneously learning two phonetically similar pseudowords during infancy or toddlerhood. The current study explores the extent to which French-speaking 3- to 5-year-olds exhibit a so-called “consonant bias” in a task simulating word acquisition, that is, when learning new words for unfamiliar objects. In Experiment 1, the to-be-learned words differed both by a consonant and a vowel (e.g., /byf/-/duf/), and children needed to choose which of the two objects to associate with a third one whose name differed from both objects by either a consonant or a vowel (e.g., /dyf/). In such a conflict condition, children needed to favor (or neglect) either consonant information or vowel information. The results show that only 3-year-olds preferentially chose the consonant identity, thereby neglecting the vowel change. The older children (and adults) did not exhibit any response bias. In Experiment 2, children needed to pick up one of two objects whose names differed on either consonant information or vowel information. Whereas 3-year-olds performed better with pairs of pseudowords contrasting on consonants, the pattern of asymmetry was reversed in 4-year-olds, and 5-year-olds did not exhibit any significant response bias. Interestingly, girls showed overall better performance and exhibited earlier changes in performance than boys. The changes in consonant/vowel asymmetry in preschoolers are discussed in relation with developments in linguistic (lexical and morphosyntactic) and cognitive processing.     

Visual field differences in visual word recognition can emerge purely from perceptual learning: evidence from modeling Chinese character pronunciation

In Chinese orthography, a dominant character structure exists in which a semantic radical appears on the left and a phonetic radical on the right (SP characters); a minority opposite arrangement also exists (PS characters). As the number of phonetic radical types is much greater than semantic radical types, in SP characters the information is skewed to the right, whereas in PS characters it is skewed to the left. Through training a computational model for SP and PS character recognition that takes into account of the locations in which the characters appear in the visual field during learning, but does not assume any fundamental hemispheric processing difference, we show that visual field differences can emerge as a consequence of the fundamental structural differences in information between SP and PS characters, as opposed to the fundamental processing differences between the two hemispheres. This modeling result is also consistent with behavioral naming performance. This work provides strong evidence that perceptual learning, i.e., the information structure of word stimuli to which the readers have long been exposed, is one of the factors that accounts for hemispheric asymmetry effects in visual word recognition.