Entwicklung gro?er Systeme mit generischen Methoden – Eine übersicht über den Sonderforschungsbereich 501

Ohne Zusammenfassung     

Submaximal exercise and maturation in 12-year-olds

The aim of this study was to examine the maturation responses of young people to submaximal treadmill exercise. Body mass was controlled using both the conventional ratio standard and allometric modelling. Ninety-seven boys and 97 girls with a mean age of 12.2 years completed a discontinuous, incremental exercise test to voluntary exhaustion. We measured peak oxygen uptake (VO2peak) and VO2 when running at 8, 9 and 10 km x h(-1). Sexual maturation was assessed visually using Tanner's indices of pubic hair. Peak VO2 was significantly higher in boys (P<0.001); this was still the case when the influence of body mass was covaried out. During submaximal exercise, no significant differences in absolute VO2 were observed between the sexes (P>0.05); however, values of VO2, expressed both in ratio with body mass and adjusted for body mass using allometry, were significantly greater in boys than in girls (P<0.001). For absolute VO2, significant main effects (P<0.05) were seen for maturity at each exercise stage. With the influence of body mass controlled using either the ratio standard or allometry, no significant main effects (P>0.05) for maturity were observed. Our results indicate that boys are less economical than girls while running at 8-10 km x h(-1) and that, independently of body mass, maturation does not influence the VO2 response to submaximal exercise.     

Excellence Beyond Athletics: Best Practices for Enhancing Black Male Student Athletes' Educational Experiences and Outcomes

Postsecondary institutions in the United States, including member institutions of the National Collegiate Athletic Association (NCAA), are charged with the responsibility of cultivating positive learning environments where all students have an opportunity to excel regardless of their demographic backgrounds (e.g., race, socioeconomic status, etc.). However, one subgroup of students these institutions have persistently been unable to retain and graduate at rates comparable to their peers is Black male student athletes. Previous research has cited unwelcoming campus climates, inadequate academic support, and an overemphasis on athletics as key factors that contribute to Black male student athletes' academic underperformance and negative psychosocial experiences at these institutions. The purpose of this article is to present a series of strategies and recommendations for enhancing Black male student athletes' educational experiences and holistic development at postsecondary institutions in the U.S. A review of scholarly literature on Black male student athletes, college student development theories, and student athlete support programs was conducted to identify best practices related to the phenomena. An analysis of the literature led to the creation of the Excellence Beyond Athletics (EBA) approach. The EBA approach consists of the following six holistic development principles (HDPs): (1) self-identity awareness, (2) positive social engagement, (3) active mentorship, (4) academic achievement, (5) career aspirations, and (6) balanced time management.     

A standardized tool for assessing the quality of classroom-based shared reading: Systematic Assessment of Book Reading (SABR)

Participation in shared-reading experiences is associated with children's language and literacy outcomes, yet few standardized assessments of shared-reading quality exist. The purpose of this study was to describe the psychometric characteristics of the Systematic Assessment of Book Reading (SABR), an observational tool designed to characterize the quality of classroom-based shared-reading sessions in early childhood settings. Participants included 105 preschool teachers. The quality of teachers’ videotaped, whole-class shared-reading sessions was examined using the SABR. Reliability levels for each of the SABRs five constructs were examined, as well as delayed alternate-form reliability and inter-rater reliability. The tools’ factor structure and construct validity were also assessed. Findings provide initial validation and preliminary evidence that the SABR is a reliable and valid tool. Potential uses for early childhood researchers, teachers, and allied professionals are described.     

Predictors of Criminal Justice Undergraduates’ Intentions to Pursue Graduate Education in Criminology or Criminal Justice

This study relies on data from 388 junior and senior criminal justice majors to examine predictors of intentions to pursue graduate education in criminology, criminal justice, or a closely related field. Logistic regression results demonstrate that women, students who receive greater encouragement to attend graduate school, students with a lower aversion to reading, writing, and statistics, and students who perceive greater diversity intolerance are more likely to report graduate school intentions. Although students’ race was not found to be significant in the overall model, split-sample models revealed that the significance of predictors varied by race and ethnicity. In discussing the findings, special attention is given to the need for primarily White institutions (PWIs) to partner with historically Black college and universities (HBCUs). We conclude by calling for departments to redouble their efforts to diversify their faculty and student bodies.     

Academic Success in Context-Based Chemistry: Demonstrating fluid transitions between concepts and context

Curriculum developers and researchers have promoted context-based programmes to arrest waning student interest and participation in the enabling sciences at high school and university. Context-based programmes aim for student connections between scientific discourse and real-world contexts to elevate curricular relevance without diminishing conceptual understanding. This interpretive study explored the learning transactions in one 11th grade context-based chemistry classroom where the context was the local creek. The dialectic of agency/structure was used as a lens to examine how the practices in classroom interactions afforded students the agency for learning. The results suggest that first, fluid transitions were evident in the student–student interactions involving successful students; and second, fluid transitions linking concepts to context were evident in the students' successful reports. The study reveals that the structures of writing and collaborating in groups enabled students' agential and fluent movement between the field of the real-world creek and the field of the formal chemistry classroom. Furthermore, characteristics of academically successful students in context-based chemistry are highlighted. Research, teaching, and future directions for context-based science teaching are discussed.     

The role of gender constancy in early gender development

Kohlberg's (1966) hypothesis that the attainment of gender constancy motivates children to attend to gender norms was reevaluated by examining these links in relation to age. Ninety-four 3- to 7-year-old children were interviewed to assess whether and how constancy mediates age-related changes in gender-related beliefs. As expected, results indicated a general pattern of an increase in stereotype knowledge, the importance and positive evaluation of one's own gender category, and rigidity of beliefs between the ages of 3 and 5. Moreover, the stability phase, rather than full constancy, mediated some of these relations. After age 5, rigidity generally decreased with age, with relations primarily mediated by consistency.     

Training and development of Canadian wheelchair basketball players

Considering the growth in research, examining the development of mainstream sport athletes over the past two decades, studies examining development of athletes with disabilities have been surprisingly limited. While similarities in developmental trajectories between the two cohorts may exist regarding factors such as the value of practice, which tend to be universal regardless of context, disability-related issues (e.g. whether the disability was congenital or acquired) may influence the course of development, affecting variables such as starting age, training and developmental milestones. Fifty-two male and female athletes training with the Wheelchair Basketball Canada National Academy provided detailed training histories. Athletes illustrated similar developmental patterns (e.g. milestones, training adjustments) as they progressed through their sporting career. However, athletes with congenital disabilities started participation in wheelchair basketball and unorganised practice at significantly younger ages (t₄₉?=??4.35, p?<?.001, d =?1.32; t₄₉?=??3.49, p?<?.001, d =?1.03, respectively). While athletes with congenital disabilities continued to reach a majority of the sporting milestones at younger ages, athletes with acquired disabilities were able to reach late career milestones (e.g. national debuts) at similar ages. Athletes’ disability severity did not influence their progress through the developmental milestones and time devoted to training throughout their sporting career. Future work may consider examining developmental trajectories and training histories of athletes in various parasports to extend our understanding of their development and skill acquisition.