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Children's ability to flexibly shift attention between different representational schemes was investigated using the dimensional change card sorting task. Across three experiments (N = 56 three‐year‐olds and N = 40 four‐year‐olds in 2 ; N = 14 three‐year‐olds in 3 ; and N = 14 three‐year‐olds in 4 ) the role of perceptual information on children's cognitive flexibility was investigated by manipulating different aspects of the task materials between pre‐ and postswitch phases. Better performance was observed when either task‐relevant (the color or shape of the images on the cards) or task‐irrelevant information (the background color or shape of the actual cards) was changed, with this improvement occurring when the changes were salient enough to induce a stimulus novelty effect. 相似文献
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Libraries have experienced a great deal of change in communication networks and information technology. The Iranian academic libraries, like other libraries, attempted to adopt the new information technology. It should be realized that although new information technologies and electronic resources are collected on a large scale by academic libraries they are not always used in the same scale. There are some factors, which affect the rate of adoption of each new technology. Rogers in his theory introduced these factors in five categories as relative advantage, observability, trial- ability, complexity and compatibility. This paper investigates the effects of different features of electronic reference materials on the rate of their adoption. Results show that the most effective factors in adoption of electronic reference materials are the ability of electronic reference materials to facilitate information retrieval, shortening the time of searching and fair cost of resources. In addition, it seems that the most problematic factors, which slow down the adoption of electronic reference materials, stem from unfamiliarity of academic librarians and users with computers and searching of databases. 相似文献
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A. Jowkar 《International Information and Library Review》2013,45(4):275-284
AbstractThe present survey attempts to investigate the viability of a single library education programme for the education of teacher-librarians in developing countries. Questionnaires were sent to 55 professional librarians in 29 different countries, of which 35 replies were received. Data were analysed and the result was compared with the outcome of a similar survey done for the education of teacher-librarians in the Islamic Republic of Iran. The overall view is that a single library programme for developing countries is possible. 相似文献
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The present survey attempts to investigate the viability of a single library education programme for the education of teacher-librarians in developing countries. Questionnaires were sent to 55 professional librarians in 29 different countries, of which 35 replies were received. Data were analysed and the result was compared with the outcome of a similar survey done for the education of teacher-librarians in the Islamic Republic of Iran. The overall view is that a single library programme for developing countries is possible. 相似文献
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