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61.
Recent handbooks of giftedness or expertise propose a plethora of conceptions on the development of excellent performance but, to our knowledge, there are no comparative studies that provide empirical evidence of their validity to guide researchers and practitioners in their adoption of a particular conception. This study sought to close that gap by conducting an empirical comparison of the major approaches to giftedness and expertise currently in use: the IQ model, the performance model, the moderator model, and the systemic model. The four models were tested in a longitudinal study with a sample of N = 350 German students attending university preparatory schools; 25% of the sample had been assigned to special classes for the gifted. The construct and predictive validity of the four models were tested by means of structural equation modeling. Theoretical considerations along with our results indicated a differentiation among the models whereby some could only predict while others could also explain the emergence of excellent performance and thereby yield valuable information for the design of interventions. The empirical comparison of the approaches showed that they were unequally suited for the two challenges. For prediction purposes, the performance approach proved best while, for explanations, the moderator and systemic approaches were the most promising candidates. Even so, the latter did demonstrate conceptual and/or methodological problems. The IQ approach was superseded by the other approaches on both prediction and explanation. Implications and limitations of the findings are discussed.  相似文献   
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Dr. Cannell asks how all 50 states can report being above average on nationally normed tests. Me reports that increased achievement is by no means the whole explanation for this finding. Whatever the full explanation of the phenomenon to which Dr. Cannell has brought widespread attention, he clearly presents a challenge to specialists in educational measurement both to better account for the phenomenon and to find better ways of explaining test results to the public.  相似文献   
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Those entering the world of publishing standards for the first time may find it a baffling alphabet soup—with NISO, ANSI, BISG, IEEE, NIST, and ANSC floating on a broth bubbling with activity. Jacob and Rings sort out the acronyms, explaining what each of these groups does and how they interact. Mary Ellen L. Jacob, vice president for library planning at OCLC, is responsible for strategic planning activities regarding libraries and library services. Mrs. Jacob is also the board chair of the National Information Standards Committee. Deborah L. Rings, information analyst for library planning at OCLC, is responsible for identifying trends and factors relative to the library and information science areas, and for assessing their impact and potential impact on OCLC and its strategic planning processes.  相似文献   
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Electronic records of government organizations are becoming increasingly important for accountability. Managing electronic records, however, proves to be difficult since information and communication technologies confront organizations with various opportunities and risks. In this paper the findings of an international expert survey on electronic records management are presented. These findings identify opportunities and risks for e-mail systems, database management systems, office systems, web technology systems and smart systems. They also point to five crucial questions that must be addressed in order to guarantee the availability of electronic records for accountability.This revised version was published online in October 2005 with corrections to the Cover Date.  相似文献   
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During the Cold War, Franco’s dictatorship attempted to use technological transfer and nuclear technology to strengthen the geopolitical influence of his Government in Spain. This paper studies this process, with particular reference to the role played by German scientists as advisers to the Spanish nuclear project.  相似文献   
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Informatik-Patente

Informatik-Patente  相似文献   
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