Eliciting and developing student's schema of classroom practices using a video-disc system

In this paper we explore the potential of videodisc technology to develop student teachers'capacity to examine their judgements and reasoning critically about typical classroom events. We describe how the type of setting for such activities is committed to and successful at provoking quality collaborative learning. The videodisc system offers a range of exemplars of teaching which are carefully managed to challenge and extend students'existing ideas. We have adapted the key learning constructs of scaffolding and modelling of various strategies so that the intellectual processes of analysis and reconstruction are persistently attended to. In this way, we are designing a more powerful learning environment to support students in acquiring professionally relevant knowledge.     

Teaching the ultimate crime: Genocide and international law in the criminal justice curriculum

The rapid expansion of international law and the establishment of an international criminal court have resulted in new justice institutions that should not be ignored in criminal justice curricula. Genocide, as the focal point of an entire course or a unit within other courses, provides instructors with an organizational framework for addressing a wide variety of topics related to international law. This paper discusses how the crime of genocide can be integrated into criminal justice curricula and the opportunities it provides for examining international law, history, current events, and the interdependence of criminal justice system components. A course on genocide taught to advanced undergraduate and beginning graduate students is described and evaluated.     

The influence of 2 weeks of low-volume high-intensity interval training on health outcomes in adolescent boys

Abstract

The present study aimed to establish whether 2 weeks of high-intensity interval training would have a beneficial effect on aerobic fitness, fat oxidation, blood pressure and body mass index (BMI) in healthy adolescent boys. Ten adolescent boys (15.1 ± 0.3 years, 1.3 ± 0.2 years post-estimated peak height velocity) completed six sessions of Wingate-style high-intensity interval training over a 2-week period. The first session consisted of four sprints with training progressed to seven sprints in the final session. High-intensity interval training had a beneficial effect on maximal O₂ uptake (mean change, ±90% confidence intervals: 0.19 L · min^?1, ±0.19, respectively), on the O₂ uptake at the gas exchange threshold (0.09 L · min^?1, ±0.13) and on the O₂ cost of sub-maximal exercise (–0.04 L · min^?1, ±0.04). A beneficial effect on the contribution of lipid (0.06 g · min^?1, ±0.06) and carbohydrate (–0.23 g · min^?1, ±0.14) oxidation was observed during sub-maximal exercise, but not for the maximal rate of fat oxidation (0.04 g · min^?1, ±0.08). Systolic blood pressure (1 mmHg, ±4) and BMI (0.1 kg · m², ±0.1) were not altered following training. These data demonstrate that meaningful changes in health outcomes are possible in healthy adolescent boys after just six sessions of high-intensity interval training over a 2-week period.     

Increased toe-flexor muscle strength does not alter metatarsophalangeal and ankle joint mechanics or running economy

ABSTRACT

The intrinsic foot musculature (IFM) supports the arches of the foot and controls metatarsophalangeal joint (MTPJ) motion. Stronger IFM can increase the effective foot length, potentially altering lower-extremity gearing similar to that of using carbon-fibre-plated footwear. The purpose of this study was to investigate if strengthening of the IFM can alter gait mechanics and improve running economy. Eleven participants were randomly assigned into an experimental group and nine into a control group. The experimental group performed IFM strengthening exercises for ten weeks. Toe-flexor strength, gait mechanics, and running economy were assessed at baseline, five weeks, and ten weeks; using a custom strength testing apparatus, motion capture and force-instrumented treadmill, and indirect calorimetry. Toe-flexor strength increased in the experimental group (p = .006); however, MTPJ and ankle mechanics and running economy did not change. The dearth of changes in mechanics may be due to a lack of mechanical advantage of the IFM, runners staying within their preferred movement path, a need for MTPJ dorsiflexion to facilitate the windlass mechanism, or the primary function of the IFM being to support the longitudinal arch of the foot as opposed to modulating MTPJ mechanics.     

Understanding the role of private speech in children's emotion regulation

Self-regulation includes both cognitive and affective components, but few researchers have investigated how these components interact to better explain self-regulation. The purpose of this study was to investigate how children's private speech, which is typically related to cognitive ability, was utilized during an emotion-eliciting task. By examining the social and private speech that occurred as children coped with a frustration task, a better understanding of how children regulate their emotional displays can be achieved. Children's speech, emotional expressions (sadness and anger), and emotion regulation strategies (distraction and self-comforting) were coded during a frustration task completed by preschool-aged children (N = 116). Children's social speech to mothers and private speech were transcribed. Children's private speech was categorized according to five mutually exclusive categories: vocalizations, inaudible muttering, task-irrelevant, negatively valenced task-relevant, or facilitative task-relevant. Sadness was associated with more social speech and negatively valenced task-relevant private speech, whereas anger was associated with less distraction and facilitative task-relevant private speech and more vocalizations and negatively valenced task-relevant private speech. Additionally, private speech predicted unique variance beyond that explained by the emotion regulation strategies and moderated the relations of emotion regulation strategies to both anger and sadness. These empirical findings support theoretical propositions that language is a factor in children's emotion regulation. The implications of these findings include support for the encouragement of private speech in the classroom because of its relation to emotional, in addition to cognitive, regulatory functions.     

Effects of High and Low Prior Knowledge on Construction of a Joint Problem Space

The participants were 4th-year medical students designing a clinical trial to test a new hypothetical anticancer drug. They worked with the computer simulation the Oncology Thinking Cap in facilitated groups that differed in terms of their prior knowledge. Both groups engaged in constructive activity and reached similar endpoints. The groups differed qualitatively in how they went about constructing and navigating the joint problem space. The high-prior-knowledge group used their knowledge to help them construct plans, evaluate their actions, and stay focused on the goals of the experimental design task. The low-prior-knowledge group searched through the data exhaustively and used them to generate their plans. They were unsystematic in their planning and interpretation. They used the computer representations in their reasoning and worked at mapping the connections between the representations. The computer scaffolding played an important role for both groups, but the facilitator played a greater role in the low-prior-knowledge group.     

Keys to Reading Among Middle School Children

A recent decline in reading has become a major issue, as Americans are not reading out of necessity or as a leisure activity. In addition, a connection has been found between children's leisure reading habits and their level of academic achievement, causing even more concern.