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981.
The amount that students read for enjoyment and for school is a major contributor to students' reading achievement and knowledge of the world. Consequently, it is important to identify the factors that predict amount of reading. A literature review revealed that motivation, strategy-use, and past reading achievement all may be expected to predict reading amount. To examine these variables, a total of 251 students in Grades 3 and 5 was administered questionnaires of these constructs and a reading test. Results showed that amount of reading for enjoyment was predicted most highly by motivation, when all other variables were controlled statistically in multiple-regression analyses. In contrast, amount of reading for school was predicted most highly by strategy use, when all other variables were controlled. However, these predictions were different for students in Grades 3 and 5. Findings of the study indicate that amount of reading is multiply determined by cognitive and motivational constructs, which is consistent with an engagement perspective on reading development. Copyright 2001 Academic Press. 相似文献
982.
H.E. Suess 《Endeavour》1980,4(3):113-117
Radiocarbon dating is, and remains, one of the most powerful methods of dating archaeological artefacts. Initially, it was assumed that the carbon-14 content of atmospheric carbon dioxide had remained constant, but latterly it has been shown that this assumption is not valid. It has now proved possible, mainly by correlation with tree-growth rings, to measure historic fluctuations in carbon-14 content and to make the necessary corrections—of up to one thousand years—to the conventionally calculated dates. 相似文献
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Leslie E. Simon 《Journal of The Franklin Institute》1944,237(5):359-370
It is shown that wrong inferences are drawn from samples because of failure to understand what constitutes a lot and because of failure to verify the existence of a lot in the practically useful sense. Time-tried methods of making valid inferences from samples without increased cost are pointed out. 相似文献
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