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Cumulative experience with a variety of symbolic artifacts has been hypothesized as a source of young children's increasing sensitivity to new symbol-referent relations. Evidence for this hypothesis comes from transfer studies showing that experience with a relatively easy symbolic retrieval task improves performance on a more difficult task. Significant transfer was found for the 2(1/2)-year-old children in the 3 studies reported here, even with relatively low levels of contextual support (according to the taxonomy of transfer by Barnett & Ceci, 2002). Transfer occurred even though the 2 tasks were encountered in very different settings and there was a prolonged (1-week) delay interval between them. Transfer also occurred to a much more difficult task (one that even 3-year-olds typically fail). 相似文献
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Donald F. McLean 《Media History》2018,24(1):46-70
The business reasons behind the decision to start the BBC television service in 1936 remain unclear despite the volume of literature on the subject. Additionally, controversy has persisted regarding foreign involvement in what has been considered a fully British system. What is apparent from the literature is an emphasis placed on the technical development, generally under-representing other aspects of television. A new multi-disciplinary approach is proposed and applied here to explore the circumstances around the emergence of the service, together with hitherto neglected industry aspects: the business and commercial issues relating to broadcaster and suppliers. This paper highlights the primacy of the BBC television service as providing the first instance of what became a common template for live television creation whilst illustrating, with new evidence, foreign influence on British engineering development for the BBC service. 相似文献