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Auditory Frequency Resolution in Human Infancy 总被引:1,自引:0,他引:1
Frequency resolution is a fundamental capacity of the auditory system that underlies the perception of all complex sounds. The development of this capacity has not been well characterized in humans. This investigation used a nonsimultaneous pulsation threshold technique to examine the development of infant frequency resolution. Psychophysical tuning curves were obtained for 3- and 6-month-olds and for adults at either 500, 1,000, or 4,000 Hz. Both the sensation level and the sound pressure level of the stimulus were varied for adults to determine the contribution of stimulus intensity to age differences in frequency resolution. At 500 and 1,000 Hz, 3- and 6-month-olds' tuning curve widths were equivalent to adults'. At 4,000 Hz, the 3-month-olds' tuning curves were broader than those of 6-month-olds and adults, even when absolute sound pressure level was equivalent. The maturation of psychophysical frequency resolution in infants is discussed in terms of the general development of the auditory system and of nonsensory factors that might contribute to age differences in performance. 相似文献
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Even though there are increasing numbers of PhD students in the distance mode, our current understanding of PhD candidature at a distance is limited and incomplete. On the one end of the spectrum are accounts of unhappy and isolated doctoral students who are separated from communities of practice. At the same time, literature offers accounts of PhD students at a distance who view themselves as agential and autonomous and are happy not to get sidetracked by others. In this reflection we ask what distinguishes the conventional PhD student from one who is studying at a distance, and invite more research on self-efficacy and vicarious learning of PhD students at a distance. 相似文献
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Benson KR 《Endeavour》2000,24(2):59-62
The modern discipline of biology was formed in the 20th century from roots deep in the natural-history tradition, which dates from Aristotle. Not surprisingly, therefore, ecology can also be traced to natural history, especially its 19th-century tradition emphasizing the adaptive nature of organisms to their environment. During the 20th century, ecology has developed and matured from pioneering work on successional stages to mathematically rich work on ecosystem energetics. By the end of the century, ecology has made a return to its natural-history heritage, emphasizing the importance of the integrity of ecosystems in considering human interactions with the environment. 相似文献
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Autobiographical queer life narratives are communicative spaces where queer teachers take up personal issues of being, becoming, and belonging in contextual and relational analyses of their situated experiences. In this work w/e consider the challenges and risks involved in this research, which, when shared and probed in classroom spaces, is a dangerous exposition of the queer self. With these challenges and risks in mind, w/e examine how our narratives provide fugitive knowledge to inform a pedagogy of ‘resist-stance’ that recognizes, respects, and engages queer identity, difference, history and culture. W/e provide examples of this pedagogy, discussing teaching strategies currently being used to connect the personal, the political and the pedagogical in classroom spaces. W/e also speak of the difficulties of living out this pedagogy as transformative teaching to transgress queer erasure in hetero-normative educational practice. 相似文献
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Mary Benson McMullen 《Journal of Early Childhood Teacher Education》2013,34(3):123-133
Abstract Twelve early childhood teachers in kindergarten/primary grades who hold opposing philosophical beliefs about developmentally appropriate practices (DAP) were interviewed about their perceived barriers to effective practice. Specifically, they were asked to discuss work‐related “things that keep them from being the best teacher they can be.” All teachers selected scored as highly efficacious about education and themselves as teachers and had low occupational stress scores. Half strongly endorsed and engaged in behaviors closely aligned with DAP and half were highly traditional. Interesting differences in terms of the relative influence of preservice education and acceptance of inclusive practices were found across the two groups of teachers, but they united in concern for standardized testing as a barrier to effective practice. Listening to these teachers can and should inform those of us engaged in pre‐ and in‐service education and policy formation and point us in future directions for research into teacher differences. © 2001 Elsevier Science Inc. All rights reserved. 相似文献