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41.
    
New Caledonian crows make and use tools, and tool types vary over geographic landscapes. Social learning may explain the variation in tool design, but it is unknown to what degree social learning accounts for the maintenance of these designs. Indeed, little is known about the mechanisms these crows use to obtain information from others, despite the question’s importance in understanding whether tool behavior is transmitted via social, genetic, or environmental means. For social transmission to account for tool-type variation, copying must utilize a mechanism that is action specific (e.g., pushing left vs. right) as well as context specific (e.g., pushing a particular object vs. any object). To determine whether crows can copy a demonstrator’s actions as well as the contexts in which they occur, we conducted a diffusion experiment using a novel foraging task. We used a nontool task to eliminate any confounds introduced by individual differences in their prior tool experience. Two groups had demonstrators (trained in isolation on different options of a four-option task, including a two-action option) and one group did not. We found that crows socially learn about context: After observers see a demonstrator interact with the task, they are more likely to interact with the same parts of the task. In contrast, observers did not copy the demonstrator’s specific actions. Our results suggest it is unlikely that observing tool-making behavior transmits tool types. We suggest it is possible that tool types are transmitted when crows copy the physical form of the tools they encounter.  相似文献   
42.
每日信条     
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43.
How is Biological Explanation Possible?   总被引:2,自引:0,他引:2  
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44.
    
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45.
Driven by a desire to improve academic outcomes and transform ‘failing’ schools, governments around the world have often turned to the development of new forms of state-funded school. This paper looks at three such instances of the introduction of new forms of schooling, within three urban localities (academy schools in London; charter schools and small schools of choice in New York City; and Schools of Tomorrow in Rio de Janeiro). It considers the extent to which these types of school did improve academic outcomes for their students and draws comparisons across each case study in order to understand their similarities and differences. It concludes that although the quasi-marketisation of school systems through the introduction of new (often private) providers might improve outcomes, this is not the only means by which improvement can be attained; and that instead the introduction of new forms of school may be successful because this enables certain other changes to happen. It highlights the limited nature of impact evidence available in all instances, which restricts our ability to properly evaluate the effect of new school types on outcomes.  相似文献   
46.
This paper presents a critical appraisal of resilience and its associated concepts within the context of higher education. It addresses wide‐ranging definitions of resilience, encompassing endurance and adaptability, and seeks to understand how these definitions impact on the learning experiences of students. As theoretical and empirical work on resilience has burgeoned in terms of adolescent experiences of education, the rise of interest has not been matched by that in studies of adult learning, particularly within university settings. This is despite the growing importance of retention studies, which have clear and important links to how well students manage their learning ability in adversity. Realization of the potential embodied in this concept to alter for the better, together with ways of conceptualizing learning and teaching, however, will remain constrained unless teachers within higher education pay attention to the resilience narratives that individual students present, and how teaching strategies can affect their learning trajectories. The paper examines some factors that impact on students’ learning within higher education, and theorizes how teaching and assessment may be adapted to promote resilience in all its forms.  相似文献   
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This autoethnographic self-study describes my interpretations of multicultural awareness, with special attention to multilingual awareness (MLA), based on my interactions with 52 students in the context of two literacy courses over a period of one year. An autoethnographic self-study provided an avenue to harness my reflections on practice and to study the ways in which my practice reflected awareness of my role as an educator. Findings from my teaching videos, written responses to students, and student evaluations suggested that my communication patterns with students reflected certain elements of multicultural awareness, as displayed by my attention to individual predispositions, cultural practices and personal stereotypes. The findings also appeared to indicate that multicultural and MLA interacted to reflect facilitation and symbiosis. Facilitation seemed apparent in my awareness of differences among students’ cultures and my own as I monitored my linguistic processing. Symbiosis appeared to emanate from the recognition of how my response to individual predispositions facilitated my application of conversational strategies based on feedback. This, in turn, heightened my attention to stereotypical attitudes and behaviors. Implications for multicultural teacher education include the benefits of using autoethnographic self-study to scrutinize educators’ awareness in practice as they determine the impact of this awareness on their instructional roles in multicultural teacher education. By extension, the study suggests that autoethnographic self-study research can provide additional lenses through which to interrogate monolithic perceptions of diversity in multicultural teacher education.  相似文献   
49.
The rapid growth of online education at the K-12 level in recent years presents the need to explore issues that influence the academic experiences of students choosing this method of learning. In this study, we examined factors that promote/hinder the learning experiences and academic self-concept of minority students attending an online high school. Qualitative interviews were conducted with twenty-four African American, and sixteen Hispanic high school students. The results showed that collaborative learning activities, access to resources, time convenience, student-teacher interactions, student-student interactions, improved academic behavior, and parental support helped to enhance online learning experiences and academic self-concept of the minority students. On the contrary, the lack of social presence, and the lack of cultural inclusion in course content constrain online learning experiences and academic self-concept of the students. The findings revealed some similarities between factors that influence minority students learning experiences online, and in face-to-face setting. The study also highlighted the need for teachers of online courses to understand the cultural backgrounds of minority students, and to use their knowledge to improve the learning experiences and academic self-concept of these students. Implications for teaching minority high school students in an online environment, as well as suggestions for future research are provided. (Keywords: minority students, K-12 online school, factors, online learning, self-concept)  相似文献   
50.
This article examines the presentation of Muslim rulers from the early crusading period, 490–540/1097–1146 in six of the main chronicles written during the first half of the seventh/thirteenth century. It discusses the themes, ideas and topoi in each, demonstrating that the historians appear to have been divided into two ‘camps’ over their presentation of these rulers, based on their personal views of the rulers of their time. The article also examines why this division may have occurred, and considers its ramifications for modern scholarship of Arabic historiography, Islamic history and the history of the Crusades, in both the sixth/twelfth and seventh/thirteenth centuries.  相似文献   
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