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501.
R. Breckinridge Church Spencer D. Kelly Kathryn Lynch 《Journal of Nonverbal Behavior》2000,24(2):151-174
Two experiments examined how 7- and 8-year-old children, 9- and 10-year-old children, and adults process mismatched, task-related speech and gesture differently as a function of development. Participants watched videotapes of children speaking and gesturing about the concept of conservation. Using a recognition paradigm, we assessed immediate memory for information conveyed in mismatched speech and gesture. In Experiment 1, we used recognition of verbal statements to probe participants' memory, whereas in Experiment 2, we used recognition of gestural statements to probe memory. When probed with verbal statements in Experiment 1, 9- and 10-year-old children failed to retrieve gestured information. When probed with gestural statements in Experiment 2, 9- and 10-year-old children failed to retrieve verbal information. In contrast, the younger children and adults showed retrieval of both verbal and gestural information across both recognition methods in Experiments 1 and 2. These results suggest a U-shaped function with the 9- and 10-year-old children showing a limitation in the ability to process contradictory messages simultaneously conveyed in two modalities. Implications for identifying a transitional period in the development of representational skills are discussed. 相似文献
502.
Further properties of the nonparametric maximum-likelihood estimator of a mixing distribution are obtained by exploiting the properties of totally positive kernels. Sufficient conditions for uniqueness of the estimator are given. This result is more general, and the proof is substantially simpler, than given previously. When the component density has support on N points, it is shown that all identifiable mixing distributions have support on no more than N/2 points. Identifiable mixtures are shown to lie on the boundary of the mixture model space. The maximum-likelihood estimate is shown to be unique if the vector of observations lies outside this space. 相似文献
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The role of human and organizational factors in predicting accidents and incidents has become of major interest to the UK offshore oil and gas industry. Some of these factors had been measured in an earlier study focusing on the role of risk perception in determining accident involvement. The current study sought to extend the methodology by focusing on perceptions of organizational factors that could have an impact on safety. A self-report questionnaire was developed and distributed to 11 installations operating on the UK Continental Shelf. A total of 722 were returned (33% response rate) from a representative sample of the offshore workforce on these installations. The study investigated the underlying structure and content of offshore employees' attitudes to safety, feelings of safety and satisfaction with safety measures. Correlations and step-wise regression analysis were used to test the relationships between measures. The results suggest that 'unsafe' behaviour is the 'best' predictor of accidents/near misses as measured by self-report data and that unsafe behaviour is, in turn, driven by perceptions of pressure for production. 相似文献
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Utilising insights from narrative theory this paper explores the role of narrative in the everyday leisure experiences of people with a mild intellectual disability. Drawing on our experiences with an Australian leisure service Live it UP! we develop the connection between leisure and storytelling in order to open up an innovative approach to working with individuals. The stories of people's capabilities that we draw on run counter to a dominant cultural story of lack associated with disability. Through a post-structuralist analysis we argue that narratives of leisure are a powerful social medium with the potential to produce change in an individual's life and immediate social relationships. Such an understanding is crucial for the development of alternative leisure support services which identify the person's needs, challenging the social positioning of people with an intellectual disability. 相似文献
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The Nature of Children's Stereotypes of Popularity 总被引:1,自引:0,他引:1
The present study investigated what types of attributions and expectations children have about peers who they believe are popular or unpopular with other children. Fourth and fifth grade children (N = 135) were presented with pictures of several unacquainted peers who were described as popular or unpopular (or neither). Children were then told about several hypothetical encounters between themselves and each of the peers and were asked to explain or rate what each peer's response would be to that situation. As hypothesized, children had negative stereotypes about children who they believed were unpopular, while stereotypes about children believed to be popular were a mixture of positive and negative elements. Results confirmed past research in suggesting that a distinction must be made between sociometric and perceived popularity. Gender differences were also discussed, because the stereotypes held by boys and girls differed in several respects. 相似文献