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331.
Studies of children's sociodramatic play as a function of socioeconomic status report conflicting and marginal findings which militate against unqualified generalizations that economically disadvantaged children engage in less and poorer-quality sociodramatic play. Further, definitive conclusions on the basis of these studies are unwarranted because of flawed methodological procedures, confounding variables, and insufficient consideration of how verbal behavior, a critical component of sociodramatic play, is affected by situational variables. It is concluded that data from play intervention studies with low-income children and ethnographic studies of children from non-Western societies are virtually irrelevant to the issue of social class differences. The theoretical significance of social class differences in pretend play in general, and sociodramatic play in particular, even if found consistently, is unclear. In future research, priority should be given to both improved assessment of social class differences and clarification of how these differences relate to competences thought to be consequences of sociodramatic and pretend play.  相似文献   
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Research on the underlying nature of reading disability, exemplified in the present papers, is essentially correlational. Differences in acoustic memory skills, partial cue utilization, or symbol-sound knowledge may be a result rather than a cause of reading skill differences. Suggestions are made on how to untangle the cause-effect problem through longitudinal investigation and careful analysis of some possible interactions between cognitive skills and reading ability.  相似文献   
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