Differences in the Intensity and Duration of Adolescents' Sports and Exercise Across Physical and Social Environments

We used data from the American Time Use Survey (years 2003–06) to analyze whether the intensity and duration of high school students' (ages 15–18 years) sports and exercise bouts differed across physical and social environments. Boys' sports and exercise bouts were more likely to reach a vigorous intensity when taking place at school and with friends/acquaintances/other people; whereas girls' sports and exercise bouts were more likely to reach a vigorous intensity when outdoors and alone. For boys and girls, bout durations were greater at school and with friends/acquaintances/other people than in other environments. Overall, environmental influences on the intensity but not duration of sports and exercise bouts appear to differ between boys and girls.     

Semantic Innovation: Arithmetical and Algebraic Metaphors Within Narratives of Learning

This paper examines a theoretical perspective on the ways in which children progress in learning mathematics. It suggests that there is a difficulty in associating teaching discourses with the mathematics they locate. This can result in an incommensurability between alternative perspectives being offered. The paper resists attempts to privilege any particular account but rather demands an analysis of these discourses and their presuppositions. In developing these themes the paper invokes Ricoeur's analysis of time and narrative as an analytical approach to treating notions such as transition, development and progression in mathematical learning. His notion of semantic innovation is introduced. This embraces both the introduction of a new metaphor into a sentence or the creation of a new narrative which reorganises events into a new plot. The notion is utilised in arguing that the shift in the student's mathematical development from arithmetic to first order linear equations with unknowns reconfigures the contextual parameters governing the understanding of these mathematical forms. It is also utilised in showing how alternative approaches to accounting for such transitions suit different and perhaps conflicting outcomes. For example, demonstrating awareness of generality or performing well in a diagnostic test featuring the solution of linear equations.This revised version was published online in September 2005 with corrections to the Cover Date.     

The relationship between bilingual proficiency and self-esteem

Proposing that bilingual proficiency should produce a more favorable attitude toward bilingualism and should enhance one's self-esteem, the authors compared 57 bilingual and 67 unilingual students from grades 9, 10, and 11, measuring their opinions about bilingualism and their self-esteem. The bilingual students are substantially more favorably disposed toward bilingualism than the unilingual students are. On the Janis-Field scale of self-esteem, the bilingual students show greater self-esteem than the unilingual students. The largest differences between the groups are on questions that measure self-confidence and social ease; differences are less pronounced on questions about self-worth and about shyness. We speculate that bilingual proficiency offers some psychological advantages to students who achieve it.     

PUBLIC OPINION AND PARLIAMENTARY ACTION: RESPONSIVENESS OF THE GERMAN BUNDESTAG IN COMPARATIVE PERSPECTIVE

Does the parliamentary behavior of members of parliament, parliamentaryparties, and government correspond with the public's preferencesregarding political issues? What conditions support the emergenceof congruence between public opinion and public policy? Thesequestions are central concerns of democratic theory. In thispaper, they are investigated empirically for the activitiesin the federal German legislature, the German Bundestag, between1949 and 1990. For this purpose, 94 time series of public opinionpolls have been combined with content analysis of more than3, 000 parliamentary documents (e.g. parliamentary questions,committe reports). If public opinion about a policy matter changes,approximately 60 percent of the respective parliamentary actionsare congruent with the direction of opinion change. The congruencebetween public opinion and public policy is greatest for opinionchanges in a conservative direction when the political statusquo is supported. Even more important than the direction ofopinion change is the public's majority opinion at the timeof parliamentary action.     

Responses of American research universities to issues posed by the changing environment of higher education

Conclusions This study clearly reveals that the benefits ascribed to strategic planning typically are achieved through a variety of means. A formal process that seeks to plan in a comprehensive, linear fashion is likely to be too complicated, politically divisive, expensive and inflexible, and to ignore how decisions are made in a complex, highly decentralised university. While many approaches to planning are used, universities must ensure they provide periodically opportunities for university staff—freed from daily responsibilities—to consider strategic concerns. Accurate and relevant information must be available to all who make and carry out decisions. Planning should be viewed as a learning process rather than a document producing exercise. Extensive communication among university staff and faculty is needed to ensure informed debate and substantial acceptance of decisions—otherwise they are unlikely to be implemented. Perhaps most important is not the process employed but the decision-maker's breadth of perspective and sophistication. No process will overcome lack of competent leadership. The importance of daily decision-making in various councils and committees on issues such as cost containment and budgetary priorities is underestimated in the literature on planning.Critics have doubted whether universities' structures and processes permit them, or their leaders have the resolve, to confront the emerging issues. However, in many respects, the universities' decentralised, multiple decision-making practices may suit them well. They face the same challenging societal changes as other sectors of society. Their staff include some of the most capable individuals in the United States, and in the past they have been highly adaptable during periods of profound social change.Universities do not appear to be less aware of the need to adapt, nor more constrained in adapting to new conditions, than other sectors of society. In fact, university research and scholarship will be highly important in pointing the way for the whole of society to meet this era's challenges. If pessimistic predictions about current trends turn out to be accurate, universities no doubt will adapt at least as well as other kinds of institutions. The travails of business in this environment are daily news! There will be occasional casualties among the universities, as frequently occurs during major social transitions, but institutions that have grown in importance for over 1,000 years, will doubtless emerge from this period perhaps somewhat changed but still performing their historic social functions.