Spatial attention based on 2D location and relative depth order modulates visual working memory in a 3D environment

The attentional effect on visual working memory (VWM) has been a heated research topic in the past two decades. Studies show that VWM performance for an attended memory item can be improved by cueing its two-dimensional (2D) spatial location during retention. However, few studies have investigated the effect of attentional selection on VWM in a three-dimensional setting, and it remains unknown whether depth information can produce beneficial attentional effects on 2D visual representations similar to 2D spatial information. Here we conducted four experiments, displaying memory items at various stereoscopic depth planes, and examined the retro-cue effects of four types of cues – a cue would either indicate the 2D or depth location of a memory item, and either in the form of physical (directly pointing to a location) or symbolic (numerically mapping onto a location) cues. We found that retro-cue benefits were only observed for cues directly pointing to a 2D location, whereas a null effect was observed for cues directly pointing to a depth location. However, there was a retro-cue effect when cueing the relative depth order, though the effect was weaker than that for cueing the 2D location. The selective effect on VWM based on 2D spatial attention is different from depth-based attention, and the divergence suggests that an object representation is primarily bound with its 2D spatial location, weakly bound with its depth order but not with its metric depth location. This indicates that attentional selection based on memory for depth, particularly metric depth, is ineffective.     

四字成语语境中汉字信号监测的警觉研究

成语中某一字出错作为应检测信号,正确成语作为噪音,实验时间为１００分钟,分成五个相等的时间段。结果发现,（１）四种音形条件下平均正检率在第一时间段明显上升然后保持平稳,反应时随时间变化不显著但音异形假在第一阶段与音同形异在第五阶段的反应时间明显长于其余时间阶段。（２）四种音形条件下正检率有差异,从高到低依次为：音同形似、音同形异、音异形似、音异形假．（３）音形与时间段在正确率上无交互作用,在反应时间上存在交互作用。     

国外人类先天“数字模块”的研究现状及展望

先天数能力是数学认知心理学的新的研究领域,国内对该领域尚缺乏整体性的认识。1999年Butterworth提出“数字模块”理论,假设人类的算术能力以先天的数字模块为基础,以后天的文化资源为拓展工具。在此基础上,作者介绍了国外近期数能力的先天机制与后天发展研究的最新情况,并对未来发展趋势作了展望。     

社交网站中的自拍对友谊质量的影响:一个有调节的中介模型

探讨社交网站中的自拍与友谊质量的关系,及线上积极反馈和外倾性在二者关系中的作用机制.采用社交网站中的自拍、线上积极反馈、友谊质量和外倾性量表对490名大学生进行问卷调查.结果 表明:(1)社交网站中的自拍显著正向预测大学生的友谊质量;(2)社交网站中的自拍通过线上积极反馈影响大学生友谊质量的后半段路径受外倾性的调节,具...     

自由飞行下冲突告警对管制员冲突探测绩效的影响

自由飞行是未来空中交通管理系统的设计理念, 会影响管制员的飞行冲突探测绩效, 为其提供自动化的冲突告警是主要的应对思路。已有研究主要围绕冲突告警的通道类型、可靠性、提前呈现时间等单一属性展开, 发现冲突告警的通道类型、可靠性对管制员冲突探测绩效的影响与传统的自动化研究结果存在不一致之处。指出未来在实验中纳入冲突化解任务, 进行冲突告警多属性的整合研究, 有助于解释这些不一致之处、为冲突告警的设计提供更有效的指导。     

Mental representations of arithmetic facts: evidence from eye movement recordings supports the preferred operand-order-specific representation hypothesis

There are three main hypotheses about mental representations of arithmetic facts: the independent representation hypothesis, the operand-order-free single-representation hypothesis, and the operand-order-specific single-representation hypothesis. The current study used electrical recordings of eye movements to examine the organization of arithmetic facts in long-term memory. Subjects were presented single-digit addition and multiplication problems and were asked to report the solutions. Analyses of the horizontal electrooculograph (HEOG) showed an operand order effect for multiplication in the time windows 150-300?ms (larger negative potentials for smaller operand first problems than for larger operand first ones). The operand order effect was reversed in the time windows from 400 to 1,000?ms (i.e., larger operand first problems had larger negative potentials than smaller operand first problems). For addition, larger operand first problems had larger negative potentials than smaller operand first in the series of time windows from 300 to 1,000?ms, but the effect was smaller than that for multiplication. These results confirmed the dissociated representation of addition and multiplication facts and were consistent with the prediction of the preferred operand-order-specific representation hypothesis.     

The functional role of alternation advantage in the sequence effect of symbolic cueing with nonpredictive arrow cues

Previous studies have shown that attention orienting is influenced by the orienting processes of previous trials in a spatial-cueing paradigm. This sequence effect is due to the fact that performance is facilitated when cue validity (valid or invalid) repeats between trials. In this study, we investigated the influences of cue direction and target location on the sequence effect of symbolic cueing with a nonpredictive central arrow cue. The cue direction was manipulated to always point in a certain direction in one condition, and to always point in the opposite direction in a second condition. The results showed that sequence effects were enhanced by the alternation of cue direction and target location and were impaired by the repetition of cue direction and target location. The same result pattern was found when the cue direction was chosen randomly in the third condition. The results suggested that both the repetition advantage effect of cue validity and the alternation advantage effect of cue direction and target location are involved in the sequence effect within the symbolic-cueing paradigm.     

With or without a hole: young infants' sensitivity for topological versus geometric property

Evidence from adult psychophysics, brain imaging, and honeybee's behaviour has been reported to support the notion that topological properties are the primitives of visual representation (Chen, 1982 Science 218 699-700). Here, we ask how the sensitivity to topological property might originate during development. Specifically, we tested 1.5- to 6-month-old infants' visual sensitivity for topological versus geometric properties with the forced-choice novelty preference technique. A disk and a ring were used in the topologically different condition (experiment 1), while a disk and a triangle were used in the geometrically different condition (experiment 2). Spontaneous preferences for the disk, the ring, and the triangle were measured pairwise using the preferential looking-time technique (experiment 3). The results showed that infants could reliably discriminate stimuli based on topological differences, but failed to do so with geometric differences. Moreover, in the generalisation task, infants showed higher novelty preference for the topologically different figure (the ring). In addition, the results of both experiments cannot be attributed to a spontaneous preference for the ring or for the disk. Further analysis on individual infants' age and performance revealed two distinct developmental trends. Infants seem to be sensitive to topological differences as young as 1.5 months, while their ability to discriminate geometric differences was at chance before 3 months and gradually improved with age. Taken together, our findings suggested an early sensitivity for topological property, at least for the detection of stimuli with or without a hole.     

基于基尼系数与洛伦茨曲线的辽宁卫生资源公平性分析

采用基尼系教与洛伦茨曲线,按人口分布和地理分布对辽宁省卫生资源的公平性进行分析评价,评价指标包括医院(卫生院)床位数、卫生总人员数、卫生技术人员数、医师数和护士(师)数等五项.评价结果显示,辽宁卫生资源配置的总体公平性较好,但部分指标的公平性较差,按人口分布公平性优于按地理分布公平性.