The effects of teacher-delivered social reinforcement on the task persistent behavior of educable mentally retarded children

The effects of teacher-delivered social reinforcers on the task persistent behavior of children enrolled in an intermediate class for the educable mentally retarded were studied. These children were grouped with a regular fourth grade class during a social studies period in which the study was conducted. The special education children were randomly divided into two groups, with seven children in each group. Using a reversal design, social reinforcers were delivered contingent upon the task persistent behavior of the seven target children. The seven youngsters in the control, or nonreinforcement, group were essentially ignored as they engaged in appropriate task-related behaviors. The results clearly show that increases in the level of task persistent behavior and the administration of social reinforcement were functionally related. The level of task persistent behavior emitted by the control children was not affected by reinforcement delivered to their peers.     

The effects of amount and type of teacher-child interaction on child-child interaction during free-play

Social interactions between preschool behaviorally handicapped children were measured under three experimental conditions during free-play: (a) active teacher involvement in free-play, (b) no teacher involvement in free-play, and (c) teacher structured free-play. Significantly more child-child interactions occurred during teacher structured free-play than in either of the other two conditions, with the no teacher involvement condition producing significantly more child-child interactions when compared to the active teacher involvement condition. Additionally, significantly more teacher-child interactions occurred during the active teacher involvement condition than in either of the other two conditions, with nonsignificant differences in teacher-child interaction between the no teacher involvement and the teacher structured conditions. The results are discussed in terms of their implications for ameliorating social interaction deficits among young behaviorally handicapped children.     

Transportation of AIE-visualized nanoliposomes is dominated by the protein corona

Liposomes, especially cationic liposomes, are the most common and well-investigated nanocarriers for biomedical applications, such as drug and gene delivery. Like other types of nanomaterials, once liposomes are incubated in a biological milieu, their surface can be immediately cloaked by biological components to form a protein corona, which confers a new ‘biological identity’ and modulates downstream interactions with cells. However, it remains unclear how the protein corona affects the transportation mechanism after liposomes interact with cells. Here, we employed home-made aggregation-induced-emission-visualized nanoliposomes TR4@Lipo as a model to investigate transportation with or without the protein corona by optical imaging techniques. The results show that the protein corona can change the cellular transportation mechanism of TR4@Lipo from energy-independent membrane fusion to energy-dependent endocytosis. The protein corona also modulates the intracellular distribution of loaded cargoes. This knowledge furthers our understanding of bio-nano interactions and is important for the efficient use of cationic liposomes.     

A comparison of haemolytic responses in fore-foot and rear-foot distance runners

This study examined the haemolytic effects of an interval-based running task in fore-foot and rear-foot striking runners. Nineteen male distance runners (10 fore-foot, 9 rear-foot) completed 8 × 3 min repeats at 90% vVO_2peak on a motorised treadmill. Pre- and post-exercise venous blood samples were analysed for serum haptoglobin to quantify the haemolytic response to running. Vertical ground reaction forces were also captured via a force plate beneath the treadmill belt. Haptoglobin levels were significantly decreased following exercise (P = 0.001) in both groups (but not between groups), suggesting that the running task created a haemolytic stress. The ground reaction force data showed strong effect sizes for a greater peak force (d = 1.20) and impulse (d = 1.37) in fore-foot runners, and a greater rate of force development (d = 2.74) in rear-foot runners. The lack of difference in haptoglobin response between groups may be explained by the trend for fore-foot runners to experience greater peak force and impulse during the stance phase of their running gait, potentially negating any impact of the greater rate of force development occurring from the rear-foot runners’ heel strike. Neither type of runner (fore-foot or rear-foot) appears more susceptible to technique-related foot-strike haemolysis.     

The influence of content knowledge on teaching and learning in Traditional and Sport Education contexts: an exploratory study

Background: Our understanding of the role in which content knowledge (CK) can strengthen instructional models and how that knowledge matters for professional development is limited. It is contended that mere use of an instructional model is insufficient to impact psychomotor learning in meaningful ways.

Purpose: This study was conducted to investigate how a teacher's enacted pedagogical content knowledge (PCK) differed as a function of CK and Sport Education (SE), and to investigate the relative contribution of CK and Sport Education on student learning in terms of swimming performance.

Methods: Four intact classes comprising 88 secondary school students (age: 16–17 years) were randomly assigned to a Traditional, an Sport Education, a Traditional-CK, and a SE-CK group. All classes were taught by the same teacher during a 10-day unit of instruction in the front crawl.

Results: Results showed that the teacher's PCK differed as a function of improved CK. For verbal representations, the amount of cues in the Traditional-CK and SE-CK groups increased about sixfold compared to the Traditional and the SE group. For visual representations, more partially incorrect demonstrations were observed than correct demonstrations in the Traditional and the SE group. More mature and developmentally appropriate tasks were observed in the Traditional-CK and the SE-CK group compared to the Traditional and the SE group. Students in the Traditional-CK and SE-CK groups demonstrated a significant reduction of their amount of strokes on 50?m compared to the Traditional group. A significant interaction effect revealed a larger increase in swimming performance in the CK groups compared to the Traditional and the SE group. Finally, students in the SE group swam significantly more laps than their counterparts in the other groups.

Discussion and conclusion: These results show the impact on student learning when CK was added to both Traditional and Sport Education conditions and contribute to the literature for pre- and in-service teachers. The Sport Education model did not contribute to students’ swimming performance. Students in the Traditional and the SE group did not get the same quality of instruction as students in the Traditional-CK and SE-CK conditions. The latter groups received content that was presented differently both as a presentation and in terms of the actual task. In short, students in the Traditional and Sport Education conditions experienced the content differently than those in the Traditional-CK and SE-CK conditions. These instructional differences resulted in students in the Traditional-CK and SE-CK conditions improving their swimming performances in terms of technical efficiency and in terms of 50?m times.     

How first-year students perceive and experience assessment of academic literacies

Abstract

First-year university students’ underdeveloped academic literacies can lead to dissatisfaction and poor performance. University teachers find it difficult to take action without an understanding of students’ perceptions and needs. This study investigates first-year Chinese students’ perceptions and experiences related to assessment of academic literacies in an English-as-a-foreign-language university context. The datasets include student focus groups at two different time points over their first university year, self-reflective essays written by students at the end of the year, and audio records of nine units of teaching in three teachers’ classes. Findings highlight that fostering students’ academic literacies incorporates both linguistic development and epistemological adaptation. Students held mixed feelings towards alternative assessment other than examinations. Their personal learning goals of using English in everyday scenarios dampened their commitment to teachers’ goals of developing learners’ academic literacies. Findings suggest assessment can be an effective ‘card’ played by teachers to nurture students’ appreciation of new learning goals, communicate areas for improvement in learning strategies, and demonstrate their visible progress.     

SERVICE-LEARNING EDUCATION IN COMMUNITY-ACADEMIC PARTNERSHIPS: IMPLICATIONS FOR INTERDISCIPLINARY GERIATRIC TRAINING IN THE HEALTH PROFESSIONS

Major changes are taking place within the health care system that have important implications for health professions education in geriatrics. The forces driving these changes are also affecting academic settings, where trends supporting the development of community-academic partnerships, service-learning models, and interdisciplinary education are all evident. These trends have major implications for health professions educators working to develop academic programs to prepare students for future practice with older adults. This article explores the impacts of these changes, in particular, on the design of interdisciplinary or collaborative education programming, including the following dimensions: assessment and definition of the problem, emphasis on functioning and quality of life, professional identity, changing roles of faculty and students, and institutional-organizational implications. General recommendations on how to respond to the challenges represented in these trends are also explored.