有性Penna模型:进化心理学的新工具

进化心理学家以进化论为基础,使用了许多不同的方法来研究人类的心灵。这些方法都有共同的缺陷,即无法直接对提出的假设进行验证,对复杂的系统进行研究难度很大,计算机模拟的方法可在一定程度上修补该问题。有性Penna模型能反映有性生殖种群的进化特点,能反映环境对生物进化的影响,通过该模型来模拟人类进化历程,则可以检验某一心理机制是否是适应的,它是研究生物进化的有力工具。本文在综述已有研究成果的基础上提出用有性Penna模型对进化心理学关于进化轨迹的假设进行验证的构想,并在此基础之上提出了用该模型进行研究的基本框架。     

初中生公正世界信念对其学业成就的影响:感知的教师支持和班级公正的中介作用

公正世界信念作为一种社会认知倾向,对于个体发展具有普遍影响,但是在学校情境中探索公正世界信念与学业成就的关系及影响机制的研究却很有限。本研究以郑州市两个区县的2584名初中一年级学生为被试,考察公正世界信念对其学业成就的影响,从班级生态环境的角度,探索个体对教师支持和班级公正的感知在二者之间的中介作用。结果发现：初中生的公正世界信念可显著预测其学业成就;在控制了性别、年龄后,学生的公正世界信念可分别通过对教师支持和班级公正的感知间接影响其学业成就,公正世界信念还可以通过感知的教师支持影响对班级公正的感知,进而影响学业成就的多重中介路径发挥作用。个体对班级教师支持和班级公正的感知是公正世界信念影响学业成就的重要途径。     

保护因素和风险因素提示对乐观偏差的影响

人们在相对风险认知中表现出的乐观偏差现象已被广泛证实。基于以往研究的不一致结果及可能存在的混淆因素,本研究考察提示保护因素和风险因素对乐观偏差的影响。实验一采用自我-同辈直接比较的方法,实验二采用自我判断方法,通过提示条件和无提示条件的比较发现,提示与将来事件相关的保护因素不影响乐观偏差,而提示风险因素能够显著降低乐观偏差,影响个人风险知觉,但是这种影响存在一定的有限性。     

Disentangling narrow and coarse semantic networks in the brain: The role of computational models of word meaning

There has been a recent boom in research relating semantic space computational models to fMRI data, in an effort to better understand how the brain represents semantic information. In the first study reported here, we expanded on a previous study to examine how different semantic space models and modeling parameters affect the abilities of these computational models to predict brain activation in a data-driven set of 500 selected voxels. The findings suggest that these computational models may contain distinct types of semantic information that relate to different brain areas in different ways. On the basis of these findings, in a second study we conducted an additional exploratory analysis of theoretically motivated brain regions in the language network. We demonstrated that data-driven computational models can be successfully integrated into theoretical frameworks to inform and test theories of semantic representation and processing. The findings from our work are discussed in light of future directions for neuroimaging and computational research.     

始终代表中国先进文化的前进方向

“三个代表”是个有机的整体。始终代表中国先进文化的前进方向,是其中的关键环节。中国共产党从来就是与先进文化紧密联系在一起的。党的十六大把“三个代表”列入党章,有着重大的理论意义。     

Enhanced perceptual priming for neutral stimuli in a traumatic context: A pathway to intrusive memories?

Clinical observations suggest that re-experiencing symptoms are triggered by stimuli that are perceptually similar to those present shortly before the trauma or its worst moments. Two experiments investigated the possible role of perceptual priming in this phenomenon. Volunteers (N = 28, N = 62) watched a series of "traumatic" and neutral picture stories, and completed blurred object identification (priming) and recognition memory tasks. Neutral objects that immediately preceded the "traumatic" stories were more strongly primed, but not better recognised, than objects from neutral stories. Enhanced priming predicted subsequent re-experiencing symptoms. The results support the role of perceptual priming in re-experiencing.     

Instrumental learning in hyperdopaminergic mice

In two experiments we investigated the effects of elevated dopaminergic tone on instrumental learning and performance using dopamine transporter knockdown (DAT KD) mice. In Experiment 1, we showed that both DAT KD mice and wild-type controls were similarly sensitive to outcome devaluation induced by sensory specific satiety, indicating normal action-outcome learning in both groups. In Experiment 2, we used a Pavlovian-to-instrumental transfer procedure to assess the potentiation of instrumental responding by Pavlovian conditional stimuli (CS). Although during the Pavlovian training phase the DAT KD mice entered the food magazine more frequently in the absence of the CS, when tested later both groups showed outcome-selective PIT. These results suggest that the elevated dopaminergic tone reduced the selectivity of stimulus control over conditioned behavior, but did not affect instrumental learning.     

Language history questionnaire: A Web-based interface for bilingual research

A Web-based interface has been developed to facilitate researchers in collecting language history information online. Most researchers use their own versions of language history questionnaires for specific studies in second language acquisition. Although these versions of questionnaires all differ from one another in some respects, there is a significant amount of overlap between them. Here we identify the crucial dimensions that most investigators consider important to include in such a questionnaire. We have examined the most commonly asked questions in 41 published questionnaires, and on the basis of our analyses we propose a general L2 language history questionnaire. Subjects can enter some or all of the information on the Web, and the results are automatically generated as an RTF output file on the user’s desktop.     

The APA Style Converter: a Web-based interface for converting articles to APA style for publication

The APA Style Converter is a Web-based tool with which authors may prepare their articles in APA style according to the APAPublication Manual (5th ed.). The Converter provides a user-friendly interface that allows authors to copy and paste text and upload figures through the Web, and it automatically converts all texts, references, and figures to a structured article in APA style. The output is saved in PDF or RTF format, ready for either electronic submission or hardcopy printing.     

A room with a view and a polarizing cue: individual differences in the stimulus control of place navigation and passive latent learning in the water maze

We investigated individual differences in the stimulus control of navigational behavior in the water maze by comparing measures of place learning in one environment to measures of latent learning (via passive placement on the goal platform) in a novel environment. In the first experiment, 12 rats were trained to find a slightly submerged hidden platform at a fixed location in room A for 10 days (4 trials/day). Fast and slow place learners were identified by their mean escape latency and cumulative distance to the goal during acquisition. The same animals were then given a 2-min passive placement on the submerged platform in room B. Latent learning was assessed by the animal's escape latency on a single swim trial immediately following the placement in room B. The results showed that the good latent learners in room B were not necessarily the fast place learners in room A. This weak correlation may be related to the fact that some rats swam near the area in room B that corresponded to the former goal location in room A relative to a common polarizing cue (i.e., the door/entrance to both rooms). When the view of the door was blocked in a second experiment a significant positive correlation between place acquisition and the latent learning test was obtained, although escape performance following passive placement was not improved. These findings suggest that while place navigation and latent learning via passive placement may involve some common cognitive-spatial function, other associative (S-S and/or S-R) processes that occur during place navigation/active movement may be required for animals to exhibit truly accurate navigational behavior characteristic of asymptotic escape performance in the water maze. Additional implications for neurobiological studies using a procedural pretraining design are discussed.