决策的三参照点理论:从原理到应用

三参照点理论(Tri-Reference Point Theory,Wang,2008a; Wang& Johnson,2012)以底线、现状和目标为参照点,将决策结果空间划分为失败、损失、获益和成功4个功能区域.根据3个参照点的心理权重的排序:底线＞目标＞现状,该模型继而推导出跨越不同区域的以现状为分界的双S-型的价值函数,以及据此产生的对于跨越不同参照点的预期结果的偏好转换、和损失-获益及失败-成功的两种不对称性.总之,风险决策的基本任务在于,在使得达到目标的可能性最大化的同时使底线不保的可能性最小化.三参照点理论将统计学和金融学中的均值与方差(均差)分析与行为决策研究中的参照点效应有机地结合在一起;在面对不同的风险选项时,通过分析各个预期结果的均差分布与3个参照点之间的关系作出适应性的决策.本文介绍了三参照点理论的基本推论、运行原则、实证检验、以及它与期望效用理论和前景理论相比较的异同之处.同时我们也探讨了三参照点理论对实践中管理决策的指导意义和多重启示.     

言语工作记忆的保持对时间知觉的影响*

采用工作记忆和时间判断的双任务范式,探讨了言语工作记忆的保持过程对时间知觉的影响。研究中操作记忆负荷和任务之间的时间间隔(ISI:记忆刺激消失到时间判断任务开始之间的时间间隔)。结果发现,记忆负荷越大,知觉到的时间越短,韦伯比例越低,反应时间越长;ISI越短,知觉到的时间变短,反应时间越长,这表明知觉时间和反应决策是一致的,不存在累加时间和反应判断之间的trade-off。但是记忆负荷和ISI的交互作用不显著。结果表明记忆负荷和ISI以不同的方式影响时间判断,言语工作记忆的保持和时间加工共享工作记忆资源。     

Microstructural characterization of the M23C6 carbide in a long-term aged Ni-based superalloy

The microstructural features of M₂₃C₆ carbide in a long-term aged heat- and corrosion-resistant Ni-based superalloy have been investigated in detail using various kinds of transmission electron microscope (TEM) techniques. It is found that TEM contrast, which is related to structural and chemical inhomogeneities inside the grains, always exists in the interior of grains in the alloy. The structure of these inhomogeneous regions has been determined to be the same as that of the γ′ and t-M₂₃C₆ phases, where t-M₂₃C₆ indicates a transitional and metastable phase. Although possessing the same structure as the M₂₃C₆ phase, the chemical composition of the t-M₂₃C₆ is different from that of the M₂₃C₆ phase. Compared with M₂₃C₆, t-M₂₃C₆ is richer in Ni, Co, Al and Ti but poorer in W, Mo and Cr. This phenomenon of structural and chemical inhomogeneity demonstrates that pristine M₂₃C₆ carbide (p-M₂₃C₆) precipitated in standard heat-treated samples is unstable. Therefore, upon long-term ageing treatment, Ni, Co, Al and Ti may locally enrich inside the p-M₂₃C₆ phase, finally forming the γ′ phase, which can be described by the decomposition reaction p-M₂₃C₆ → M₂₃C₆ + γ′.     

Children Exposed to Marital Conflict Exhibit More Disordered Eating Behaviors: Child Emotional Insecurity and Anxiety as Mechanisms of Risk

Disordered eating in children is a major public health concern, as it is precursor to clinical eating disorders and obesity. However, little is known about the potential causes of child disordered eating. The current study examined marital conflict as a predictor of disordered eating in a sample of children aged 5–12 years, from the perspective of emotional security theory. Ninety five children and their parents in the Southeast United States participated in the study. We found that marital conflict was associated with higher levels of restrained eating, emotional eating and external eating behaviors controlling for demographics and parental feeding practices. Further, we examined the possible pathways between marital conflict and child disordered eating and found that marital conflict was related to greater child emotional insecurity about the family, which was associated with greater child anxiety, which were then related to disordered eating. In addition to serving as a secondary pathway linking emotional insecurity to child disordered eating, anxiety also significantly directly mediated the association between marital conflict and all three types of disordered eating: restrained eating, emotional eating and external eating in children. Next we examined if parental feeding practices (food monitoring, food restriction and parental pressure to eat) moderate the relation between marital conflict and child disordered eating. Parental pressure to eat was negatively associated with child disordered eating under higher marital conflict. The current study highlights the importance of marital conflict and child emotional security as precursors of child disordered eating.     

Motor knowledge is one dimension for concept organization: Further evidence from a Chinese semantic dementia case

Neuropsychological and neuroimaging studies have indicated that motor knowledge is one potential dimension along which concepts are organized. Here we present further direct evidence for the effects of motor knowledge in accounting for categorical patterns across object domains (living vs. nonliving) and grammatical domains (nouns vs. verbs), as well as the integrity of other modality-specific knowledge (e.g., visual). We present a Chinese case, XRK, who suffered from semantic dementia with left temporal lobe atrophy. In naming and comprehension tasks, he performed better at nonliving items than at living items, and better at verbs than at nouns. Critically, multiple regression method revealed that these two categorical effects could be both accounted for by the charade rating, a continuous measurement of the significance of motor knowledge for a concept or a semantic feature. Furthermore, charade rating also predicted his performances on the generation frequency of semantic features of various modalities. These findings consolidate the significance of motor knowledge in conceptual organization and further highlights the interactions between different types of semantic knowledge.     

Did you have sex with him? Do you love her? An in vivo test of sex differences in jealous interrogations

Abundant evidence suggests that between sex differences exist in the degree to which cues to sexual and emotional infidelity trigger jealousy. A criticism of this research is that this commonly found sex difference is a consequence of the hypothetical scenario and forced-choice methodology that is commonly employed. This study used a novel method to explore the nature of jealousy-fueled interrogations (N = 75) in the face of actual infidelities captured on video in the syndicated reality program Cheaters. Fifty-one episodes of Cheaters were content analyzed by six coders trained to watch each episode. As predicted, men were more likely than women to inquire about the sexual aspect of their partners’ infidelities, whereas women were more likely than men to inquire about the emotional aspect of their partners’ infidelities. These results suggest that humans have sex-differentiated damage assessment strategies dedicated to investigating the nature of their mates’ extra-pair relationships. Although previous studies have found sex differences in jealousy using prospective and retrospective reports, this is the first study to demonstrate sex differences in romantic jealousy in vivo. These findings refute the criticism that sex differences in jealousy are mere methodological artifacts. Discussion focuses on the benefits and limitations of content-analyzing Cheaters.     

Reconnaissance des visages d’un autre groupe ethnique : éclairage d’une approche développementale

We are reviewing the recent findings on the Other Race Effect (ORE), which is the difficulty to recognize faces from other race compared to own race faces. Several hypotheses were proposed: negative attitude (Brigham and Malpass, 1985), attentional mechanisms (Chance and Goldstein, 1981), and the contact hypothesis (Brigham et al., 1982) which postulates that the ORE is due to a lack of experience with other race's faces. The contact hypothesis being, of course, modulated by attention and attitude. Valentine (1991 ; Valentine and Endo, 1992) proposes a norm-based coding model in which faces are encoded as vectors according to their deviation from a prototypical average. The resulting dimensions will differ according to the input received with certain salient, individuating dimensions carrying more “weight” than others. Predominant exposure to faces of a specific species, gender, or race early in life will cause the dimensions of one's prototype to become “tuned” towards such faces. The evidence presented support Valentine's model but we are showing that the quality of the contact is crucial in the experience. We are arguing that a developmental approach is necessary to better understand the ORE. Infants are able to process and recognize faces from an early age and several recent studies have found that the ORE can be observed from 9-10 months of age. Experimental results indicate that 6- to 9-months of age represents an important time of transition in the face processing system. If a certain type of face (other races) is not experienced prior to this period, then we appear to lose our ability to discriminate between individual faces within those groups.     

Phantom Behavioral Assimilation Effects: Systematic Biases in Social Comparison Choice Studies

ABSTRACT Consistent with social comparison theory (SCT), Blanton, Buunk, Gibbons, and Kuyper (1999) and Huguet, Dumas, Monteil, and Genestoux (2001) found that students tended to choose comparison targets who slightly outperformed them (i.e., upward comparison choices), and this had a beneficial effect on subsequent performance—a behavioral assimilation effect (BAE). We show (Studies 1 and 2) that this apparent BAE is due, in part, to uncontrolled measurement error in pretest achievement. However, using simulated data (Study 3), these phantom BAEs were eliminated with latent‐variable models with multiple indicators. In Studies 4 and 5, latent‐variable models were applied to the Blanton et al. and Huguet et al. data, resulting in substantially smaller but still significantly positive BAEs. More generally in personality research based on correlational data, failure to control measurement error in pretest/background variables will positively bias the apparent effects of personality variables of interest, but widely applicable approaches demonstrated here can correct for these biases.     

干细胞技术与肝硬化:共性与个性的新实践

干细胞横向分化(transdifferentiation)的能力,在肝脏再生过程中发挥作用,随着对干细胞的深入研究,干细胞技术为终末期肝病的治疗提供了新思路。本文对干细胞加以分类并综述了各种干细胞研究进展,对干细胞在肝脏疾病细胞治疗上的应用及前景作了总结和展望。     

山东东周鼎簋制度初论——以中原地区为参照

鼎簋制度作为社会存在的一种反映,是一个动态的概念,把用鼎规格普遍、有序的提升归结为僭越有形而上学之嫌。春秋中期至战国中期,中原高级墓葬一般随葬数套列鼎,是鼎簋制度的套鼎时期,也是鼎簋制度的高峰期。以往多认为战国中晚期是鼎簋制度的瓦解、崩溃时期,实际上,这一时期随葬列鼎的现象仍然普遍存在,鼎簋制度并没有瓦解,其瓦解期应在秦汉。由于历史、地理等原因,山东地区的鼎簋制度与中原地区存在较大差异:一是山东多数地区没有严格推行鼎簋制度;二是山东地区鼎簋制度的基础较为薄弱,瓦解现象出现较早,瓦解速度也较快;三是春秋中晚期至战国早、中期普遍流行于中原的套鼎现象,山东地区基本没有发现。