自然分娩与剖宫产的比较研究

剖宫产不是一种分娩方式,而是解决难产的手段.日益增高的剖宫产率成为人们关注的热点话题,自然分娩和剖宫产对母婴的健康和卫生资源的影响,有很多的研究和争议,对于没有医学指征要求剖宫产目前倾向于在知情同意的情况下尊重患者的自主权和选择权,但控制剖宫产率在一个理性的范围之内,是一个系统工程,值得全社会的关注.     

How much memory does oculomotor search have?

Research has demonstrated that oculomotor visual search is guided by memory for which items or locations within a display have already been inspected. In the study reported here, we used a gaze-contingent search paradigm to examine properties of this memory. Data revealed a memory buffer for search history of three to four items. This buffer was effected in part by a space-based trace attached to a location independently of whether the object that had been seen at that position remained visible, and was subject to interference from other stimuli seen in the course of a trial.     

Contingent visual marking by transients

Preview search is a phenomenon in which a set of new items can be searched with seemingly no interference from items already present in the display. The preview effect has been shown to occur only when the presentation of the new items is accompanied by a luminance change (Donk & Theeuwes, 2001). In a series of experiments, we extend the type of transients that can lead to a preview benefit to offsets and motion, and confirm Donk and Theeuwes's finding that equiluminant color changes do not lead to a preview effect. Like Donk and Theeuwes, we find that preview search does not occur when only the old items undergo a transient change, suggesting that the processes responsible for preview search are triggered when the new items undergo a change detectable by the magnocellular system. In addition, we find that irrelevant transients interfere with preview search only when they match the current attentional set (e.g., luminance change or motion). Results suggest that preview search is not the automatic capture of attention by transients, but rather is contingent on top-down control settings.     

Managing computer integrated manufacturing (CIM): A review of themes,issues, and practices

Large scale changes from traditional to computer integrated manufacturing (CIM) make fundamental alterations in the way work gets done in an organization. The incorporation of sophisticated computerized machinery into the work flow, however, is only the catalyst for a range of human resource and organizational issues. A review of the literature suggests that the management of these issues in the transition from traditional to computerized systems is critical to success. The review is presented within a time frame that encompasses the major themes of a CIM change effort. These themes include the decision phase or automation consideration, the developmental phase, the bridging phase that spans the gap between planning and implementation, and the implementation phase. Important management issues are summarized at each step, including cost justification, management commitment, planning, vendor and union relationships, employee resistance, education and training, job redesign, and organizational restructuring. Wherever applicable, specific practices and real-world examples for effectively managing these issues are presented.     

Rank on Emotional Intelligence,Unlearning and Self-Leadership

Propelled from the inner circle after publishing The Trauma of Birth (1924), Otto Rank jettisoned Freud's science of knowing because it denied the intelligence of the emotions. Transforming therapy from knowing to being-in-relationship, Rank invented modern object-relations theory, which advocates continual learning, unlearning and relearning: that is, cutting the chains that bind us to the past. Separating, no matter how anxiety-provoking, from outworn phases of life, including previously taken-for-granted ideologies and internalized others, is essential for self-leadership. In 1926, Rank coined the terms “here-and-now” and “pre-Oedipal.” By 1926, Rank had formulated a model of “creative willing”—self-leadership infused with the intelligence of the emotions—as the optimal way of being-in-relationship with others.     

A Normative Study of an Auditory Projective Technique

The purpose of this study is to provide normative data for the sound effect sequences of the Braverman-Chevigny Auditory Projective Test. The test was administered to 149 college undergraduates in a group setting, who were asked to compose stories to the seven sound sequences. Stories were coded in terms of tone, outcome, number of characters, theme, and identification of “hero.” The stories were predominantly negative in tone, with outcomes generally neutral or unsuccessful. Interscorer reliabilities were all significant beyond the .001 level.     

Object-based control of attention is sensitive to recent experience

How is attention guided by past experience? In visual search, numerous studies have shown that recent trials influence responses to the current trial. Repeating features such as color, shape, or location of a target facilitates performance. Here we examine whether recent experience also modulates a more abstract dimension of attentional control, object-based and location-based control. Participants performed a cued target discrimination task with stimuli presented on 2 rectangles. Response times to targets appearing in an uncued location on a cued rectangle were faster than to targets on the uncued rectangle, demonstrating an object-based attentional benefit. We investigated the object-based benefit on the current trial contingent on the cue-target relationship on the previous trial. The object-based benefit was significant only when the cued object contained the target on the previous trial, not when the uncued object contained the target. This effect of recent experience was not due to either the repetition of spatial cue-target location or the repetition of the response, but to adaptation to contingencies in the environment. Our results suggest a unifying view of attentional control that spans the concrete dimensions of control (e.g., determining the relative importance of red vs. blue) to the abstract (determining the relative importance of objects vs. locations in space). Attention closely tracks the short time scale structure of the environment and automatically adapts to optimize performance to this structure.     

The role of attentional breadth in perceptual change detection

Previous research has shown that changes to scenes are often surprisingly hard to detect. The research reported here investigated the relationship between individual differences in attention and change detection. We did this by assessing participantś breadth of attention in a functional field of view task (FFOV) and relating this measure to the speed with which individuals detected changes in scenes. We also examined how the salience, meaningfulness, and eccentricity of the scene changes affected perceptual change performance. In order to broaden the range of individual differences in attentional breadth, both young and old adults participated in the study. A strong negative relationship was obtained between attentional breadth and the latency with which perceptual changes were detected; observers with broader attentional windows detected changes faster. Salience and eccentricity had large effects on change detection, but meaning aided the performance of young adults only and only when changes also had low salience.