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171.
John Willats 《Child development》1992,63(3):692-710
Piaget has suggested that the reason why children find it difficult to draw foreshortened views is because they lack any conscious awareness of their own viewpoint. Instead, it is proposed that most of these difficulties derive from the constraints of drawing as a representational system: for example, although a round region shows a true view of a foreshortened stick, it is unsatisfactory as a representation. To test between these alternative proposals, 4-, 7-, and 12-year-olds were asked to draw sticks and discs in foreshortened and nonforeshortened positions. As predicted, fewer 7- and 12-year-olds used a round region to represent a foreshortened stick, compared with children of the same age who used a long region to represent a foreshortened disc. In addition, the 12-year-olds used a different and more effective denotation system compared with the 7-year-olds. 相似文献
172.
John Clarke 《Research in Science Education》1988,18(1):83-94
Conclusion This study indicates the responsibility that rests with the teacher in an activity-oriented classroom as far as providing
the structural support necessary for effective learning (Note 4). The teacher is acting as a “surrogate textbook”. Using their
own organization of knowledge-albiet wrong or incomplete-teachers provide the structure that is lacking. As the results indicate,
some teachers can do this better than others.
A challenge for teachers and teacher educators is to devise ways to improving the structure and sequencing of classroom dialogue.
The TSA Technique could help here in two ways. It allows a sophisticated analysis of dialogue, indicating specific areas of
weakness which could then be remedied by appropriate training. A similar approach has been used successfully with text material
to rewrite and restructure deficient segments (Clarke; 1973). It could also be used to produce ideal “templates” of various
models of teaching (e.g. Brady; 1985) for use as a guide for lesson planning. 相似文献
173.
Chayna J. Davis Valerie S. Knopik Richard K. Olson Sally J. Wadsworth John C. DeFries 《Annals of dyslexia》2001,51(1):231-247
The present study assesses the genetic and environmental etiologies of reading, rapid naming (RN), and their covariation by
fitting multivariate structural equation models to data from 587 twin pairs in which at least one member of the pair exhibited
reading difficulties (low-range) and from 360 control (normal-range) twin pairs who were tested in the Colorado Learning Disabilities
Research Center. Results from a bivariate phenotypic analysis with two hypothesized latent factors, READ and RN, indicated
that the correlation between reading and rapid naming performance for the low-range sample was significantly higher than that
of the normal-range sample. When this model was partitioned to include estimates of genetic, shared environmental, and nonshared
environmental influences, resulting heritability estimates did not differ significantly for the low-range and normal-range
samples for either READ or RN. However, similar to the phenotypic correlation, the genetic correlation between the READ and
RN latent factors could not be equated for the two groups. Thus, the etiology of the relationship between reading performance
and rapid naming may differ for children with reading difficulties and normally-achieving readers. Moreover, these results
support previous findings that the best predictors of reading skills may differ for samples of children with normal reading
levels and those with reading difficulties. 相似文献
174.
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178.
Hiller A. Spires Shea N. Kerkhoff Abbey C. K. Graham Isaac Thompson John K. Lee 《Reading and writing》2018,31(6):1401-1434
The goal of this study was to define the construct and establish the validity of disciplinary literacy, which has recently gained attention from the implementation of the Common Core State Standards (National Governors Association Center for Best Practices & Council of Chief State School Officers in Common Core State Standards for English language arts & literacy in history/social studies, science, and technical subjects [PDF]. Authors, Washington, DC, 2010). After defining disciplinary literacy in the four core disciplines of English language arts, science, history and social studies, and mathematics, scales were developed and administered to a snowball sample of professionals nationwide, with 857 respondents. The data showed evidence of disciplinary literacy as a multidimensional construct with three related factors: source literacy, analytic literacy, and expressive literacy. Based on EFA and CFA results, we can conclude that there are at least three types of literacy in operation among the four core disciplines. The three factors of literacy varied significantly by the four core disciplines of English/language arts (ELA), science, history and social studies, and mathematics, supporting the notion that each discipline uses literacy uniquely. This is the first study of its kind to attempt to define, quantify, and validate the construct of disciplinary literacy. 相似文献
179.
180.
Richard J. Viken Danny L. Moore John F. Knutson David J. Fordyce 《Learning & behavior》1982,10(2):135-140
The effects of isolation and handling on the reactivity of rats to two tactile stimuli were assessed in two experiments. In the first experiment, reactivity to more intense footshock was increased in rats raised in isolation but was not affected by handling by an experimenter. In the second experiment, increased reactivity to airpuff stimuli presented to the dorsal surface of isolation-reared rats was reduced by handling. The data suggest that the effects of handling on shock-motivated behaviors are not due to altered reactivity to shock and that the effect of housing or handling must be considered in behavioral tests in which reactivity to tactile stimulation might play a role as dependent or independent variables. 相似文献