What Kind of a Girl Does Science? The Construction of School Science Identities     

Nancy W. Brickhouse  Patricia Lowery  Katherine Schultz 《科学教学研究杂志》2000,37(5):441-458

A view of science as a culturally‐mediated way of thinking and knowing suggests that learning can be defined as engagement with scientific practices. How students engage in school science is influenced by whether and how students view themselves and whether or not they are the kind of person who engages in science. It is therefore crucial to understand students' identities and how they do or do not overlap with school science identities. In this paper, we describe four middle school African American girls' engagement with science. They were selected in the 7th grade because they expressed a fondness for science in school or because they had science‐related hobbies outside of school. The data were collected from the following sources: interviews of students, their parents and their teachers; observations in science classes; journal writing; and focus groups. These girls' stories provide us with a better understanding of the variety of ways girls choose to engage in science and how this engagement is shaped by their views of what kind of girl they are. © 2000 John Wiley & Sons, Inc. J Res Sci Teach 37: 441–458, 2000.  相似文献   

The relationship between protective factors and outcomes for children investigated for maltreatment     

Dana Schultz  Shannah Tharp-Taylor  Amelia Haviland  Lisa Jaycox 《Child abuse & neglect》2009,33(10):684-698

ObjectivesThis research explores the relationship between hypothesized protective factors and outcomes for children investigated for maltreatment.MethodsUsing data from the National Survey on Child and Adolescent Well-Being (NSCAW), we ran logistic regression models to examine the relationship between hypothesized protective factors (social competence, adaptive functioning skills, and peer relationships) and outcomes (externalizing behavior, internalizing behavior, reading competence).ResultsFor each hypothesized protective factor, we found variation in individual scores and sample mean scores at the lower end of the scales, indicating that these children fare worse than most children. However, many children experienced large changes in their individual scores over time suggesting that children can and do improve on these hypothesized protective factors. In examining the relationship between hypothesized protective factors and outcomes, children with higher levels of social competence were significantly more likely to be in the normal range for both externalizing and internalizing behaviors. Children with higher mean adaptive functioning skills were more likely to be in the normal range for both externalizing behavior and reading competence. The positive nature of the child's peer relationships was also related to externalizing behavior and reading competence.ConclusionsOverall, our analyses support the idea that social competence, adaptive functioning skills, and peer relationships are related to outcomes for children investigated for maltreatment. While further research is needed to establish a causal link, this work identifies three individual-level hypothesized protective factors as potential sources of variation in outcomes.Practice implicationsTo prevent or alleviate the harmful consequences maltreatment, it is necessary to understand factors that help children move beyond poor outcomes. Our analyses suggest that a strong relationship exists between a child's social competence, adaptive functioning skills and positive peer relationships and select outcomes three years after being investigated for maltreatment. With these individual-level protective factors related to more positive outcomes, it suggests that intervening to increase protective factors could improve outcomes for maltreated and at-risk children.  相似文献   

Alternative assessment of knee joint muscle balance of soccer players through total work-based hamstring: quadriceps ratios     

Felipe Minozzo  Carlos Leonardo Figueiredo Machado  Eurico Nestor Wilhelm  Rafael Grazioli  Ronei Silveira Pinto 《European Journal of Sport Science》2018,18(10):1398-1404

Isokinetic hamstring-to-quadriceps (H:Q) ratios are frequently used to assess knee muscle strength imbalances and risk of injuries/re-injuries. The use of peak torque (PT) or total work (TW) to estimate joint stability may lead to different results because of the differences between these two neuromuscular variables. Thus, the current study aimed to compare the conventional and functional H:Q ratios calculated by PT and TW. Ninety-three male professional soccer players from Brazilian first division teams performed isokinetic concentric and eccentric contractions of the quadriceps and the hamstrings at 60°/s. Muscle strength balance was calculated using the conventional torque ratio (CTR) and conventional work ratio (CWR), functional torque ratio (FTR) and functional work ratio (FWR) were highly and moderately correlated between them (r?=?0.83 and r?=?0.73, respectively). The Wilcoxon statistical test revealed significant differences between CTR and CWR, as well as FTR and FWR (p?T-test demonstrated significant differences in mean CTR–CWR and FTR–FWR, whereas Bland–Altman plots showed non-consistent bias. In addition, the chi-square test demonstrated significant differences between players below the conventional reference values and functional reference values (p?相似文献   

Recognizing the Outliers: Behaviors and Tendencies of the Profoundly Gifted Learner in Mixed-Ability Classrooms     

Robert Arthur Schultz 《Roeper Review》2018,40(3):191-196

This article focuses on (a) distinctions between the profoundly gifted individual and others, and (b) a chart describing tendencies and/or behaviors associated with the profoundly gifted student in common, mixed-ability educational settings. The intent is to provide educators, parents, and policymakers with preliminary awareness about the unique behaviors and tendencies of the profoundly gifted learner in heterogeneous educational settings. Learners with measured IQ scores greater than 3 SD units above the mean are a statistical rarity—outliers—in most educational settings. The current inability of most educators to identify and even minimally address needs leaves these students anxious, frustrated, and otherwise unable to reach their intellectual capacity in the majority of school settings across the country. Focused research and careful attention to the nature and needs of these individuals throughout their lives can contribute substantially to our developing understanding.  相似文献   

Effects of an unsupervised pedometer-based physical activity program on daily steps of adults with moderate to severe asthma: a randomized controlled trial     

Cristina Martins Coelho  Maycon Moura Reboredo  Felipe Martins Valle  Carla Malaguti  Larissa Almeida Campos  Lucas Mendes Nascimento 《Journal of sports sciences》2018,36(10):1186-1193

Supervised exercise has shown benefits for subjects with asthma, but little is known about the effectiveness of unsupervised physical activity on this population. We investigated the effects of a 12-week unsupervised pedometer-based physical activity program on daily steps and on clinical and psychological parameters of adults with asthma. Clinically stable adults with moderate to severe asthma were encouraged to take daily 30-minute walks and were randomized to pedometer and control groups. The pedometer group received pedometers and individualized daily step targets. Changes in daily steps (average of steps taken during six consecutive days), six-minute walk test (6MWT), health-related quality of life, asthma control and anxiety and depression levels were assessed 12 weeks after intervention and 24–28 weeks after randomization. Thirty-seven participants were recruited and 30 completed the intervention. At 12 weeks, the groups differed significantly in daily steps (adjusted average difference, 2488 steps; 95% confidence interval [CI], 803 to 4172; p = 0.005) and in the 6MWT (adjusted average difference, 21.9 m; 95% CI, 6.6 to 37.3; p = 0.006). These differences were not significant 24–28 weeks after randomization. The program was effective in increasing daily steps of adults with moderate to severe asthma 12 weeks after intervention.  相似文献   

The mascot that wouldn’t die: a case study of fan identification and mascot loyalty     

Brad Schultz  Mary Lou Sheffer 《Sport in Society》2018,21(3):482-496

The issue of sports mascot loyalty, especially to those mascots considered offensive, was investigated through fan identification theory, and applied to the mascot controversy at a large university in the United States. Replicating a previous university survey on the mascot question, a survey of current university students (N = 3616) revealed a strong relationship between mascot loyalty and fan identification, particularly related to one’s perceptions of ‘belonging to the university sports family’, and ‘associating with sports fans’ of the university. Other important findings include age differences and the marginalization of Asian-American fans. The implications and applications of these findings were discussed.  相似文献   

Effects of a contrast training programme on jumping,sprinting and agility performance of prepubertal basketball players     

Pedro Ángel Latorre Román  Francisco Javier Villar Macias  Felipe García Pinillos 《Journal of sports sciences》2018,36(7):802-808

The purpose of this study was to examine the effects of a 10 week contrast training (CT) programme (isometric + plyometric) on jumping, sprinting abilities and agility performance in prepubertal basketball players. Fifty-eight children from a basketball academy (age: 8.72 ± 0.97 years; body mass index: 17.22 ± 2.48 kg/m²) successfully completed the study. Participants were randomly assigned to experimental groups (EG, n = 30) and control groups (CG, n = 28). The CT programme was included in the experimental group’s training sessions – twice a week – as part of their usual weekly training regime. This programme included 3 exercises: 1 isometric and 2 plyometric. Jumping, sprinting and agility performance were assessed before and after the training programme. Significant differences were found in posttest between EG and CG in sprint and T-test: EG showed better results than CG. Furthermore, there were significant differences in posttest-pretest between EG and CG in squat jump, countermovement jump, drop jump, sprint and T-test with the EG showing better results than CG. The CT programme led to increases in vertical jump, sprint and agility levels, so that the authors suggest that prepubertal children exhibit high muscular strength trainability.  相似文献   

Measuring instructional practice in science using classroom artifacts: lessons learned from two validation studies     

José Felipe Martínez  Hilda Borko  Brian M. Stecher 《科学教学研究杂志》2012,49(1):38-67

With growing interest in the role of teachers as the key mediators between educational policies and outcomes, the importance of developing good measures of classroom processes has become increasingly apparent. Yet, collecting reliable and valid information about a construct as complex as instruction poses important conceptual and technical challenges. This article summarizes the results of two studies that investigated the properties of measures of instruction based on a teacher‐generated instrument (the Scoop Notebook) that combines features of portfolios and self‐report. Classroom artifacts and teacher reflections were collected from samples of middle school science classrooms and rated along 10 dimensions of science instruction derived from the National Science Education Standards; ratings based on direct classroom observations were used as comparison. The results suggest that instruments that combine artifacts and self‐reports hold promise for measuring science instruction with reliability similar to, and sizeable correlations with, measures based on classroom observation. We discuss the implications and lessons learned from this work for the conceptualization, design, and use of artifact‐based instruments for measuring instructional practice in different contexts and for different purposes. Artifact‐based instruments may illuminate features of instruction not apparent even through direct classroom observation; moreover, the process of structured collection and reflection on artifacts may have value for professional development. However, their potential value and applicability on a larger scale depends on careful consideration of the match between the instrument and the model of instruction, the intended uses of the measures, and the aspects of classroom practice most amenable to reliable scoring through artifacts. We outline a research agenda for addressing unresolved questions and advancing theoretical and practical knowledge around the measurement of instructional practice. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 49: 38–67, 2012  相似文献   

Becoming Visible: Shifting Teacher Practice to Actively Engage New Immigrant Students in Urban Classrooms     

Katherine Schultz  Chonika Coleman-King 《The Urban Review》2012,44(4):487-509

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Towards a multidimensional model for evaluating electronic government: Proposing a more comprehensive and integrative perspective     

Luis Felipe Luna-Reyes  J. Ramon Gil-Garcia  Georgina Romero 《Government Information Quarterly》2012

The use of information and communication technologies has been a key strategy for government reform. It offers diverse benefits, ranging from efficiency and effectiveness to transparency and greater democratic participation. Governments in many parts of the world have invested vast resources into electronic government projects with the expectation of achieving these and other outcomes. However, the results in many cases are limited and there is no comprehensive way to evaluate these initiatives at the aggregate level. A method for measuring and evaluating electronic government that identifies its advances and problems is needed. Previous efforts to do so are limited in terms of scope and dimensions being considered. Based on a review of current literature and the analysis of international best practices, this paper proposes a multidimensional model for measuring and evaluating electronic government. It also includes examples, a proposal of how to operationalize it, and several recommendations for practical use.  相似文献