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Learning to Crawl   总被引:3,自引:0,他引:3  
The effects of infants' age, body dimensions, and experience on the development of crawling was examined by observing 28 infants longitudinally, from children's first attempts at crawling until they began walking. Although most infants displayed multiple crawling postures en route to walking, development did not adhere to a strict progression of obligatory, discrete stages. In particular, 15 infants crawled on their bellies prior to crawling on hands and knees, but the other 13 infants skipped the belly-crawling period and proceeded directly to crawling on hands and knees. Duration of experience with earlier forms of crawling predicted the speed and efficiency of later, quite different forms of crawling. Most important, infants who had formerly belly crawled were more proficient crawling on hands and knees than infants who had skipped the belly-crawling period. Transfer could not be explained by differences in infants' age or body dimensions alone. Rather, experience using earlier crawling patterns may have exerted beneficial effects on hands-and-knees crawling by shoring up underlying constituents common to all forms of crawling postures.  相似文献   
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Unter den ?sterreichischen Hochschulen besitzen ausschlie?lich die (Privat-) Universit?ten das Promotionsrecht. Insbesondere Fachhochschulen bzw Erhalter von Fachhochschul-Studieng?ngen k?nnen den Doktorgrad nicht verleihen. Vor dem Hintergrund zunehmend intensiver Forschungsaktivit?ten an Fachhochschul-Studieng?ngen stellt sich die Frage, ob ein eigenst?ndiges Promotionsrecht auch für Fachhochschulen bzw Erhalter von Fachhochschul-Studieng?ngen denkbar w?re. Im Beitrag wird die diesbezügliche rechtliche Ausgangssituation analysiert und der Versuch unternommen, Vorteile eines "Dr. (FH)" wie ebenso Voraussetzungen, unter denen ein Fachhochschul-Promotionsrecht Bestand haben k?nnte, zu skizzieren. Das Ziel besteht nicht darin, für ein eigenst?ndiges Fachhochschul-Promotionsrecht zu pl?dieren, sondern vielmehr die einschl?gige Diskussion zu bereichern.  相似文献   
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Research on subjective misconceptions in physics has not systematically investigated interindividual differences or the impact of formal physics instruction. In this empirical study, two sets of more abstract and of more familiar kinematics tasks were given to a sample (N=201) consisting of two cohorts of German secondary school students (one having received 18 months of physics instruction and the other none), balanced according to level of intelligence (high versus average) and sex. The answers obtained in diagram form were analysed for correct versus incorrect solutions and for subjective misconceptions in physics. Quantitative and qualitative differences in the answers were found between male and female students as well as between students of high versus average intelligence, particularly for the abstract tasks. From the cross‐sectional analysis, it was concluded that only boys profited from physics instruction in school Considering these important subgroup differences, consequences for special schooling for gifted and for female students are discussed

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