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The aim of this study was to examine the effects of sport goggles on visual target detection in female intercollegiate athletes. Participants were randomly divided into three groups that varied in goggle use (G) or no goggle use (NG) over a total of three 1-min trials during a visual target detection task. The NG-NG-NG group did not wear goggles for any of the trials, whereas the NG-G-NG group wore goggles for the second trial only, and the G-NG-G group wore goggles for the first and third trials. The task consisted of illuminated targets arranged in five concentric rings from central to peripheral visual angles. The effects of sport goggles on response time to detect targets were most evident in the peripheral rings. Those who did not wear sport goggles showed improved performance from the first to second trials. This improvement was impaired, however, in those who wore sport goggles. Moreover, there was a reversal of the performance improvements achieved without goggles in those who wore goggles on the third trial. Together, these findings suggest the sport goggles not only impaired the expected initial performance but also impaired visual target detection after performance improvements were seen. These findings suggest sport goggles may impair detection of peripheral visual stimuli in athletes. 相似文献
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This article describes the investigation of white efflorescence on eight wooden African objects from Malawi and Zambia and the treatment of the objects to remove the deposits. The source of the efflorescence on these objects was determined to be the heartwood from which they were carved. Using gas chromatography-mass spectrometry and Fourier transform infrared spectrometry, the crystalline efflorescence was found to consist of homopterocarpin and pterocarpin, two isoflavonoid compounds found in woods and shrubs belonging to the genus Pterocarpus, and African Baphida nitida. The crystal growth appeared to be heaviest on areas of the objects that were more deeply carved as well as on those objects without a surface finish. The storage conditions of the collection were studied and found to have likely accelerated the rate and extent of the natural movement of the pterocarpan compounds from the interior of the heartwood to the outer surfaces. 相似文献
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Eating is broadly conceptualized as food choice. Food choice is a complex activity with many dimensions. Food choice is multifaceted as it involves whether, where, when, how long, how, why, with whom, for whom, and under what conditions eating occurs. Food choice is contextual as it is situated within specific conditions and settings involving both individuals and institutions. Food choice is dynamic as it unfolds and is embedded in eating episodes over lifetimes within historical eras. Food choice is multilevel as physical, biological, psychological, and sociocultural factors operate simultaneously and interact. Food choice is integrated as people coordinate many considerations to construct specific eating activities. Food choice is diverse in its broad scope of distinct and unique eating activities. Food choice can be examined using both multi‐perspective and multi‐purpose approaches, and it may not be possible to integrate different perspectives into a unified approach to understanding and changing food choice. 相似文献
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The decades-long assault on principles of special education—some knowingly, such as the regular education initiative, and some unknowingly, such as certain presumptions and practices of full inclusion—have consequences that may negatively affect the future of the field. Protracted criticisms on the character, role, and legitimacy of traditional special education and its related policies and practices have, in some ways, weakened its identity. It is conceivable that special education, as a robust and independent educational component is being threatened. Factors leading to this conclusion are discussed as well as a call for recognition of policy implications and needed research to guide policy development. 相似文献
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It is somewhat of a truism to say that reading is not what it used to be. ‘Texts’for reading now include many other media than simply print on pages and this fact has occasioned some concern among those who fear that reading television or computer-based texts may reduce or impoverish children's overall reading experience. Chris Robertson and her students have been investigating these issues through interviews with children and have found that reading and technology are not actually in conflict but can be mutually supportive. This article suggests that teachers need to think more creatively about how to use alternative texts in developing children's reading. 相似文献
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