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41.
The factorial structure underlying different types of tasks within the domain of phonological awareness was examined in two studies. Large sample sizes allowed for sensitive differentiation of constructs. In the first study, 128 preschool children without any experience of formal reading instruction were tested with a battery of tasks intended to tap various aspects of phonological awareness: rhyme recognition, syllable counting, initial-phoneme matching, initial-phoneme deletion, phoneme blending, and phoneme counting. Three basic components were extracted in a principal component analysis: a phoneme factor, a syllable factor and a rhyme factor. Cross-tabulations indicated considerable dissociation between performance on phoneme, syllable, and rhyme tasks. The structural relationships were replicated on a much larger sample (n=1509) in the second study. Subjects in this study were one year older and were attending grade 1 thus providing an opportunity to test their reading achievement. Multiple regression analyses demonstrated that the phonemic factor was by far the most potent predictor. However, the rhyming factor made an independent (although small) contribution to explaining the reading variance. Among the phonemic tasks, phoneme identification proved to be the most powerful predictor.  相似文献   
42.
Oral and silent reading was studied for moving-window text displayed on a computer screen. Experiment 1 investigated whether local linguistic properties of text being read aloud affect speed in performing a dual task or the distance which a reader's voice lags behind the text seen. Regression analyses showed that choice reaction time during reading is not predicted by any linguistic properties of the immediate text considered, and that these properties instead predict a measure of eye-voice span. Experiment 2 investigated whether, in silent reading, reference is assigned to expressions in text while, or after, they are being viewed. In nearly all contexts, readers were observed to confirm that a given character in a story was being referred to only after the source expression in text had passed out of view. In general, the results tend to speak against an hypothesis about reading which holds that a reader completes processing of an expression in text while still looking at it.  相似文献   
43.
Anna Lundberg 《Interchange》2003,34(2-3):219-240
This paper works alongside other studies claiming the need for further elaboration of the theory of the demographic transition. A number of perspectives on the transition, some of them related to gender, democracy, education, and labour has, according to Tim Dyson, been insufficiently researched by social scientists. The most recently introduced material from the Demographic Database, forms from the Statistical Committee, have been used to chart the demographic transition in the northern-most counties in Sweden during the years between 1800–1850. The hypothesis being that even in these pre-urban and pre-industrialized societies, opportunities to connect with other parts of Sweden could be congruent to a faster progress through the demographic transition. This would lead to lower crude death rates and infant mortality in the coastal parishes. This was true to a certain extent, but this methodologically tentative study also affirms previous research on infant mortality and the need for smallpox vaccination and midwives.  相似文献   
44.
BackgroundPhysical activity is favorable for health, and vigorous sports activity is particularly beneficial. This study investigates the association between changes in sports participation patterns over time and cardio-metabolic and self-perceived health outcomes.MethodsData from 3752 adults (18–79 years of age) who participated in 2 national health interview and examination surveys in 1997–1999 and 2008–2011 were included, with a mean follow-up time of about 12 years. A change in self-reported sports activity was analyzed with respect to the incidence of type 2 diabetes, coronary heart disease (CHD), hypertension, obesity, dyslipidemia, metabolic syndrome, and poor self-perceived health. Participants with pre-existing disease or risk factor of interest at baseline were excluded from the analysis. Being sufficiently active in sports was specified as doing sports for at least 1–2 h per week, and 4 activity categories were defined: 1) inactive at both time points (inactive–inactive), 2) inactive at baseline and active at follow-up (inactive–active), 3) active at baseline and inactive at follow-up (active–inactive), and 4) active at both time points (active–active). Associations between sports activity engagement and health outcomes were estimated by logistic regression models with different stages of adjustments.ResultsNot engaging in any regular sports activity at both time points (inactive–inactive) was associated with higher rates of type 2 diabetes (odds ratio (OR) = 1.82, 95% confidence interval (95%CI): 1.08–3.08), CHD (OR = 1.82, 95%CI: 1.16–2.84), hypertension (OR = 1.36, 95%CI: 1.03–1.81), metabolic syndrome (OR = 1.58, 95%CI: 1.08–2.32), and poor self-perceived health (OR = 2.54, 95%CI: 1.83–3.53) compared to doing regular sports for a minimum of 1–2 h per week over time (active–active). In case of change from inactivity to any regular sports activity (inactive–active), the rate of risk factor occurrence was not statistically different from the active–active reference group except for poor self-perceived health, but it was higher for type 2 diabetes (OR = 2.15, 95%CI: 1.12–4.14) and CHD (OR = 1.77, 95%CI: 1.03–3.03). Being active at baseline but inactive at follow-up (active–inactive) was not associated with higher disease incidence of type 2 diabetes (OR = 0.70, 95%CI: 0.25–1.97) or CHD (OR = 1.20, 95%CI: 0.49–2.99), but was associated with higher rates of hypertension (OR = 1.61, 95%CI: 1.11–2.34), obesity (OR = 2.34, 95%CI: 1.53–3.57), metabolic syndrome (OR = 1.70, 95%CI: 1.11–2.63), and poor self-perceived health (OR = 2.16, 95%CI: 1.53–3.07) at follow-up.ConclusionEven a low weekly quantity (1–2 h) of regular sports activity is partly associated with health benefits. Being formerly but not currently active was not associated with an increased disease incidence, but was associated with a higher risk-factor development compared to the reference group (active–active). Becoming active was preventive for risk-factor development but was not preventive for disease incidence, which probably means that the health benefits from sports activity are not sustainable and disease incidence is only shifted to a later period in life. For this reason, the promotion of and commitment to regular sports activity should be addressed as early as possible over the lifespan to achieve the best health benefits.  相似文献   
45.
Phonological awareness is a critical enabling skill in learning to read, often developed outside the context of formal reading instruction. More than 2,000 6-year-old children were tested on phonological awareness at two occasions during the preschool year in two cohorts. Between the assessments, a training program was implemented. A two-level path model was applied. More frequent training sessions were connected to higher gains of test scores especially for children with low initial scores in the first cohort. A clear gender effect was also observed. There were more boys with very low initial scores and more girls among the top scorers. A clear SES-effect indicated the influence of early language stimulation. Children who already at the beginning of the preschool year had grasped the alphabetic code had the highest initial scores on the test.  相似文献   
46.
Data from 123 male adults were analyzed to estimate environmental influences on components of literacy skills and to explore the impact of environmental factors in different approaches to define reading difficulty. Literacy skills were decomposed into general cognitive function, reading comprehension, spelling, word reading, and phonological ability. Environmental factors examined were related to home conditions, school conditions, and literacy environment. Results suggest that there is a substantial social-cultural bias in the delineation of literacy skills and in the definitions of reading disabilities. Results also suggest that phonological ability constitutes the only measure relatively unaffected by environmental influences. This study has brought forward a new argument for emphasizing phonological deficits as the core component in defining dyslexia.  相似文献   
47.
ABSTRACT

This article offers a revision to an existing social science methodology, Q methodology, through “Q-Rhetoric.” After detailing Q methodology’s theoretical underpinnings and practical method, and persistent critiques of the methodology, the article employs perspectives from rhetorical theory and Amerindian anthropology to suggest a methodological correction. It concludes by detailing the use of Q-Rhetoric to intervene in a Wisconsin stream management controversy, proposing Q-Rhetoric as a pragmatic and theoretically sound methodology for working across disciplinary divides.  相似文献   
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