负性情绪对压抑遗忘记忆的影响

该实验使用Think/No-think(T/NT)任务,从外显和内隐记忆两个方面探讨负性情绪、测试时间对压抑遗忘的影响。实验结果表明:在外显记忆成绩中情绪与T/NT任务的交互作用显著,在NT条件下中性词回忆的成绩优于负性词,同时,情绪的主效应显著,被试对中性词的记忆显著高于负性词。但是T/NT任务的主效应不显著,情绪×T/NT任务×测试时间的交互不显著。在内隐记忆成绩中,在所有条件下的记忆成绩均无显著性差异。     

A new orthorhombic approximant of the icosahedral Al–Cu–Fe quasicrystal

We report on the formation of a new crystalline approximant phase of the icosahedral (i-)Al–Cu–Fe quasicrystal. This phase is formed during sintering of Al-based composites reinforced with i-AlCuFeB quasicrystalline particles. The structure of this phase has been characterized by transmission electron microscopy (TEM) and high-resolution electron microscopy (HREM). TEM revealed that it is a B-centred orthorhombic phase with lattice parameters a = 1.166 nm, b = 1.195 nm and c = 3.44 nm. Its chemical composition, as determined by electron energy loss spectroscopy (EELS), is close to Al_76.9Cu_2.7Fe_20.4, with an average number of valence electrons per atom e/a of 1.92, similar to the value in all other approximants of the i-phase discovered thus far. Initial results on local atomic arrangements along one of its pseudo-5-fold axes are also presented.     

Deformation mechanism of long-period TiAl 2

The microstructure of long-period TiAl 2 deformed at room temperature has been studied by means of transmission electron microscopy. Dislocations, stacking faults and twins were found to contribute to the deformation. A screw superdislocation with Burgers vector d 110] dissociates into two ½ d 110] super-partial dislocations associated with an antiphase boundary. The ½; d 110] super-partial dislocation further dissociates into two Shockley partial dislocations associated with a portion of complex intrinsic stacking fault on the closest-packed {111} plane. The propagation of stacking faults on successive {111} planes yields an order twin.     

Surface effect on the screw dislocation mobility over the Peierls barrier

The effect of the image force on the Peierls stress (τ _p ) of a screw dislocation below a free surface is studied via a self-consistent semidiscrete variational Peierls–Nabarro model. The consequence of reduction in elastic energy and increase in stacking fault energy by the presence of the free surface is found to additively increase the Peierls stress (τ _p ). This model gives a physical interpretation of the same tend observed in a recent molecular dynamic study, while previous continuum analysis predicted the opposite.     

Investigation of {111} stacking faults and nanotwins in epitaxial BaTiO3 thin films by high-resolution transmission electron microscopy

{111} stacking faults and nanotwins in epitaxial BaTiO₃ thin films on MgO substrates have been investigated by high-resolution transmission electron microscopy. In many cases, the stacking faults and nanotwins were found to be accompanied by partial dislocations. These partial dislocations can be classified as two different types, analogous to the situation in the fcc structure. One is of the Shockley type with the Burgers vector (a/3)<112>. The other is of the Frank type with the Burgers vector (a/3)<111>. The movements of both types of partial can lead to the {111} stacking faults and the {111} twins observed in these films.     

Constructing Confidence Intervals for Effect Size Measures of an Indirect Effect

Confidence intervals for an effect size can provide the information about the magnitude of an effect and its precision as well as the binary decision about the existence of an effect. In this study, the performances of five different methods for constructing confidence intervals for ratio effect size measures of an indirect effect were compared in terms of power, coverage rates, Type I error rates, and widths of confidence intervals. The five methods include the percentile bootstrap method, the bias-corrected and accelerated (BCa) bootstrap method, the delta method, the Fieller method, and the Monte Carlo method. The results were discussed with respect to the adequacy of the distributional assumptions and the nature of ratio quantity. The confidence intervals from the five methods showed similar results for samples of more than 500, whereas, for samples of less than 500, the confidence intervals were sufficiently narrow to convey the information about the population effect sizes only when the effect sizes of regression coefficients defining the indirect effect are large.     

生活事件对情感和行为的影响：理论比较与启示

关于生活事件对个体情感反应和行为选择的影响研究, 均试图从不同生活事件和行为决策关系的角度对个体的影响机制进行解释, 但不同理论之间存在争议。行为/经济理论认为人“绝对理性”, 而平均/累加模型、峰-终定律和心理账户认为人“有限理性”。详细比较发现, 各理论在解释的视角、研究方法的选择、生活事件的界定等方面均有不同。未来研究应围绕理论之间的鉴别与整合、生活事件属性与个体属性之间的交互影响以及研究方法的多元化等方面展开。     

小学生对不同词语类型预视加工的发展*

采用边界范式,以60名小学生为被试,探讨了小学生不同词语类型的预视效应。结果表明:(1)五年级学生表现出更高的阅读效率;(2)预视类型的主效应显著,出现明显的预视效应;(3)不同词语类型的预视效应差异不显著;(4)未出现副中央凹-中央凹效应。研究结果支持阅读眼动的序列加工模型。     

择偶与人类嗓音

本文对择偶与人类嗓音之间的关系进行了深入分析。首先, 人类具有普遍的异性嗓音偏好：男性偏爱高音调的女性嗓音, 女性偏爱低音调的男性嗓音, 这种普遍偏好受到一系列跟自身婚配价值有关的因素的调节。其次, 人类的嗓音偏好跟嗓音背后的进化意义密切关联：女性化嗓音是女性生育力的线索, 而男性化嗓音是男性好基因和好资源的线索。而且, 富有吸引力的男性嗓音和女性嗓音能够预测个体的性行为和繁殖成功。再次, 富有有吸引力的人类嗓音影响个体的社会认知, 对亲密关系的维系也会带来消极影响。最后, 我们探讨了未来研究的若干方向：研究基频之外的其他嗓音参数, 探讨嗓音偏好的性选择机制、特殊群体的嗓音偏好, 以及嗓音偏好与其他认知过程的关系。