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131.
This study addresses the communication apprehension of the non‐native English speaker in the U.S. Previous studies which have examined the implications of communication apprehension (CA) for bilingual, non‐native communicators have generated results which indicate that trait‐like CA is consistent across first and second language‐speaking situations. However, none of these studies have probed the cause of the cross‐linguistic consistency of CA. This research is designed to provide a scientific explanation for the etiology of CA by applying the communibiological paradigm to CA theory and research. By selecting the situational constraints of international students, this study tests a theory based on proposition 4 of the communibiological paradigm (Beatty & McCroskey w/Valencic, 2001, p. 128): “Environment or ‘situation’ has only a negligible effect on interpersonal behavior.” The results of this study replicate the strong relationship previously observed between CA in a first language and CA in a second language. It also found that the genetic markers employed (Eysenck's Big 3 temperament variables) predicted first and second language CA approximately equally. The results indicate that, although both first and second languages are learned, the CA associated with them most likely is not.  相似文献   
132.
This paper reports on teachers’ perceptions of the educational affordances of a handheld application called Participatory Simulations. It presents evidence from five cases representing each of the populations who work with these computational tools. Evidence across multiple data sources yield similar results to previous research evaluations of handheld activities with respect to enhancing motivation, engagement and self-directed learning. Three additional themes are discussed that provide insight into understanding curricular applicability of Participatory Simulations that suggest a new take on ubiquitous and accessible mobile computing. These themes generally point to the multiple layers of social and cognitive flexibility intrinsic to their design: ease of adaptation to subject-matter content knowledge and curricular integration; facility in attending to teacher-individualized goals; and encouraging the adoption of learner-centered strategies.  相似文献   
133.
    
The purpose of this study was to examine from an ecological perspective the relationships between multiple levels of family disruption and children's academic functioning in a sample of 390 urban, Black adolescents at age 14. Subjects in this cohort have been followed longitudinally since before their birth. Data from previous assessments at birth and age 7 years allowed for control of important correlates in this analyses. Examination of this unique sample, using multisource data collection procedures, provides important information about the many family disruptions among urban, low‐income families and the effects of these disruptions on academic outcomes. Results revealed several consistent findings, the most notable of which is that, when parents were married, adolescents demonstrated significantly higher grades, mediated through paternal involvement. Of all variables studied, the role of fathers in the lives of these adolescents was the most influential on academic outcomes. In this unique sample, even variables such as involvement with child protective services were not significantly related to outcomes after important control variables were factored into analyses. Results of this study have important implications for future research and for prevention and intervention efforts in urban, at‐risk samples. Emphasis is made for work in the school context, particularly for school psychologists. © 2011 Wiley Periodicals, Inc.  相似文献   
134.
    
The research reported in this study concerns older adults from Australia who voluntarily chose to learn the craft of woodturning. The paper examines the literature of adult learning under the themes of presage factors, the learning environment, instructional methods, and techniques for facilitators. The paper then reports on the analysis of two sections of a questionnaire completed by 123 respondents: the first on motivation to learn and the second on learning strategies. The older learners reported using both intrinsic and extrinsic motivation, with intrinsic motivation constructed of both general and specific elements. There were four main learning strategies used: actively seeking knowledge, independent learning, dependent learning, and passively seeking knowledge.  相似文献   
135.
    
As a prerequisite for meaningful comparison of latent variables across multiple populations, measurement invariance or specifically factorial invariance has often been evaluated in social science research. Alongside with the changes in the model chi-square values, the comparative fit index (CFI; Bentler, 1990) is a widely used fit index for evaluating different stages of factorial invariance, including metric invariance (equal factor loadings), scalar invariance (equal intercepts), and strict invariance (equal unique factor variances). Although previous literature generally showed that the CFI performed well for single-group structural equation modeling analyses, its applicability to multiple group analyses such as factorial invariance studies has not been examined. In this study we argue that the commonly used default baseline model for the CFI might not be suitable for factorial invariance studies because (a) it is not nested within the scalar invariance model, and thus (b) the resulting CFI values might not be sensitive to the group differences in the measurement model. We therefore proposed a modified version of the CFI with an alternative (and less restrictive) baseline model that allows observed variables to be correlated. Monte Carlo simulation studies were conducted to evaluate the utility of this modified CFI across various conditions including varying degree of noninvariance and different factorial invariance models. Results showed that the modified CFI outperformed both the conventional CFI and the ΔCFI (Cheung & Rensvold, 2002) in terms of sensitivity to small and medium noninvariance.  相似文献   
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137.
Background: This exploratory study is part of a larger-scale research project aimed at building theoretical and practical knowledge of complex systems in students and teachers with the goal of improving high school biology learning through professional development and a classroom intervention.

Purpose: We propose a model of adaptive expertise to better understand teachers’ classroom practices as they attempt to navigate myriad variables in the implementation of biology units that include working with computer simulations, and learning about and teaching through complex systems ideas.

Sample: Research participants were three high school biology teachers, two females and one male, ranging in teaching experience from six to 16 years. Their teaching contexts also ranged in student achievement from 14–47% advanced science proficiency.

Design and methods: We used a holistic multiple case study methodology and collected data during the 2011–2012 school year. Data sources include classroom observations, teacher and student surveys, and interviews. Data analyses and trustworthiness measures were conducted through qualitative mining of data sources and triangulation of findings.

Results: We illustrate the characteristics of adaptive expertise of more or less successful teaching and learning when implementing complex systems curricula. We also demonstrate differences between case study teachers in terms of particular variables associated with adaptive expertise.

Conclusions: This research contributes to scholarship on practices and professional development needed to better support teachers to teach through a complex systems pedagogical and curricular approach.  相似文献   
138.
This essay explores the political implications of the flash mob dance in Dhaka, Bangladesh performed in response to the 2012 global viral sensation of South Korean rapper PSY’s “Gangnam Style” music video. The global fame of “Gangnam Style” has much to do with its success online and in the U.S. popular music industry. It, however, also solicited suspicion from popular culture critics that the images of comical PSY worked successfully thanks to unchecked consumption of the racial stereotypes of Asian men. While recognizing these problems as more than valid, this essay simultaneously calls for a more transnational and inter-Asian understanding of the material to argue for a productive quality of PSY’s performance. Using “refraction” as a mode of thinking about inter-Asian circulation of pop culture, this essay considers the flash mob performed in Dhaka, Bangladesh as an important yet underexplored case study that shows different performative practices associated with “Gangnam Style” deeply rooted in historicity of colonialism and nationalism. The case study shows that the circulation of “Gangnam Style” materialized through a performance in Dhaka enlarged contemporary discourse among young urban Bangladeshi spectators around Bangladeshiness and its cultural identity. This complicated an easy assumption about “Gangnam Style” and its success in the U.S. mainstream pop culture, while simultaneously displacing the Bangladeshi cultural subjects from the immobile position of “the Other.”  相似文献   
139.
140.
    
The random walk of spherical living cells on a silicon dioxide glassy substrate was studied experimentally and numerically. This random walk trajectory exhibited erratic dancing, which seemingly obeyed anomalous diffusion (i.e., Lévy-like walk) rather than normal diffusion. Moreover, the angular distribution (−π to π) of the cells'' trajectory followed a “U-shaped pattern” in comparison to the uniform distribution seen in the movements of negatively charged polystyrene microspheres. These effects could be attributable to the homeostasis-driven structural resilient character of cells and physical interactions derived from temporarily retained nonspecific binding due to weak forces between the cells and substrates. Our results provide new insights into the stochastic behavior of mesoscopic biological particles with respect to structural properties and physical interactions.  相似文献   
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