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Suicide clusters are a rare and underresearched phenomenon which attract wide media attention and result in heightened concern in the communities where they occur. We conducted a systematic literature review covering the definition and epidemiology of the time–space clustering of suicidal behavior. Of the 890 articles identified by electronic searching, 82 were selected for inclusion and the extracted data were analyzed by narrative synthesis. Less than a third of studies included a definition of a suicide cluster, and definitions varied considerably. Clusters occurred in various settings, including psychiatric hospitals, schools, prisons, indigenous communities, and among the general population. Most clusters involved young people. The proportion of all episodes that occurred in clusters varied considerably between studies and partly depended on study methodology (e.g., a larger proportion was found in studies of specific clusters compared with general population studies). Future studies should aim to combine the statistical analysis of time–space clustering with a case study of events, which examines potential links between individuals and the wider environmental context.  相似文献   
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The aim was to investigate how children conceptualize personal events of positive and negative valences pertaining to the physical and psychological domains. Five‐ to 9‐year‐olds narrated events referring to suffering states (Study 1, n = 112) and to suffering and wellbeing states (Study 2, n = 118). Analysis of the narratives revealed differences between the two states, with higher focus on events pertaining to a physical domain for suffering and to psychological domain for wellbeing; however, older children were more oriented toward psychological than physical events for both valences. Children showed higher tendency to produce causes compared to consequences, with younger children finding it difficult to introduce physical causes. Psychological suffering narratives revealed a richer psychological lexicon and more instances of domain coexistence. Asymmetry in the representation of different state valences and domains indicates multifaceted and developing conceptualization. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   
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The present cross-sectional study aimed to clarify the relationships among specific facets of dispositional mindfulness, psychological well-being, and emotional distress. To understand the relationships among these variables is crucial in order to expand the knowledge of the processes underlying mindfulness effects and to develop effective interventions. The participants (119 Italian males and females; mean age = 29 years) completed self-report questionnaires assessing mindfulness (i.e., observing, describing, acting with awareness, non-judging of inner experience, non-reactivity to inner experience), emotional distress, and psychological well-being. Path analysis revealed that each facet of mindfulness played a unique role in influencing emotional suffering. In line with our prediction, no significant correlation emerged between the observing facet and either psychological well-being or emotional distress. Both the capacity to describe inner events and to act with awareness had an indirect effect on emotional distress, which was fully mediated by the perception of psychological well-being. On the other hand, the capacity for non-reacting to emotions and thoughts directly influenced emotional distress. Interestingly, non-judging inner events showed both a direct and indirect effect on the outcome variable. These findings confirmed the significant role of psychological well-being in mediating the relationship between some facets of mindfulness and emotional distress. Moreover, different mindfulness abilities play specific roles in reducing emotional distress, so mindfulness should be considered as a multidimensional construct.  相似文献   
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Geometrical concepts are critical to a host of human cognitive achievements, from maps to measurement to mathematics, and both the development of these concepts, and their variation by gender, have long been studied. Most studies of geometrical reasoning, however, present children with materials containing both geometric and non-geometric information, and with tasks that are open to multiple solution strategies. Here we present kindergarten children with a task requiring a focus on geometry: navigation in a small-scale space by a purely geometric map. Children spontaneously extracted and used relationships of both distance and angle in the maps, without prior demonstration, instruction, or feedback, but they failed to use the sense information that distinguishes an array from its mirror image. Children of both genders showed a common profile of performance, with boys showing no advantage on this task. These findings provide evidence that some map-reading abilities arise prior to formal instruction, are common to both genders, and are used spontaneously to guide children's spatial behavior.  相似文献   
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The shape of holes can be recognized as accurately as the shape of objects (Palmer, S. E. (1999). Vision science: photons to phenomenology. Cambridge, MA: MIT Press), yet the area enclosed by a hole is a background region, and it can be demonstrated that background regions are not represented as having shape. What is therefore the shape of a hole, if any? To resolve this apparent paradox, we suggest that the shape of a hole is available indirectly from the shape of the surrounding object. We exploited the fact that observers are faster at judging the position of convex vertices than concave ones (Perception 30 (2001) 1295), and using a figural manipulation of figure/ground we found a reversal of the relative speeds when the same contours were presented as holes instead of objects. If contours were perceived as belonging to the hole rather than the surrounding object then there would have been no qualitative difference in responses to the object and hole stimuli. We conclude that the contour bounding a hole is automatically assigned to the surrounding object, and that a change in perception of a region from object to hole always drastically changes the encoded information. We discuss the many interesting aspects of holes as a subject of study in different disciplines and predict that much insight especially about shape will continue to come from holes.  相似文献   
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We used data from a large, longitudinal study of children in the community, the NICHD Study of Early Child Care and Youth Development, to examine how well earlier measures of delay capacity, inhibitory control, planning, and attention predicted symptoms of attention deficit hyperactivity disorder (ADHD) assessed in third grade. Children with elevated symptoms of both inattention and hyperactivity-impulsivity (n = 57) and with inattentive symptoms only (n = 80) were identified via mother and teacher reports using the “or” rule, as were children without significant symptoms (n = 790). Multinomial logistic regression analyses indicated that poorer performance on earlier measures of resistance to temptation, delay of gratification, response inhibition, attention, and planning obtained from 36 months to 1st grade predicted membership in the two symptom groups relative to the comparison group in 3rd grade, albeit with somewhat different patterns of predictors. Controls for 36 month school readiness and externalizing symptoms indicated that these results were generally robust and not an artifact of initial cognitive or behavioral differences. Implications for developmental models of ADHD are discussed.
Susan B. CampbellEmail:
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