Physical activity and social support in adolescents: analysis of different types and sources of social support

Little is known about the influence of different types and sources of social support on physical activity in adolescents. The aim of this study was to analyse the association between physical activity and different types and sources of social support in adolescents. The sample consisted of 2,859 adolescents between 14–19 years of age in the city of João Pessoa, in Northeastern Brazil. Physical activity was measured with a questionnaire and social support from parents and friends using a 10-item scale five for each group (type of support: encouragement, joint participation, watching, inviting, positive comments and transportation). Multivariable analysis showed that the types of support provided by parents associated with physical activity in adolescents were encouragement for females (P < 0.001) and adolescents between 14–16 years of age (P = 0.003), and transportation (P = 0.014) and comments (P = 0.037) for males. The types of social support provided by friends were: joint participation in male adolescents (P < 0.001) and in these 17–19-year-olds (P < 0.001), and comments in both genders (males: P = 0.009; females: P < 0.001) and 14–16-year-olds (P < 0.001). We conclude that the type of social support associated with physical activity varies according to its source, as well as the gender and age of the adolescents.     

Trademarks as an indicator of innovation and industrial change

As innovation becomes an ever more central issue for the development of firms and world economies, so the need for improved assessments of innovative performance grows more urgent. This paper suggests that trademark analysis can contribute in capturing relevant aspects of innovation phenomena and the process of industrial change. We propose trademarks as a complementary indicator in the portfolio of available empirical tools of innovation studies and industrial dynamics. Our empirical exploration is based on a study of community trade marks (CTM), an intellectual property right granted in the European Union, and draws on recent research on trademarking trends in Portugal. Quantitative as well as qualitative data, including survey data from a representative sample of Portuguese manufacturing and services firms, are used to identify the advantages and limitations of this indicator.     

Adaptation of the Multidimensional Trauma Recovery and Resilience (MTRR) questionnaire in a sample of Chilean mothers with a history of child abuse

OBJECTIVE: Adaptation of the Multidimensional Trauma Recovery and Resilience (MTRR) in a Chilean sample. METHOD: Participants were 80 mothers drawn from two large metropolitan areas (Santiago and Temuco). Sample participants (in a case control design) were redivided in two groups: 40 mothers identified as physical abusers with history of physical child abuse and 40 mothers identified as nonabusers with history of physical child abuse. Groups were matched on 5 sociodemographic variables. Reliability analysis, item analysis, and group comparisons on the 8 scales of the instrument were performed. RESULTS: Interrater agreement level was .79 (Kendall's W coefficient) and the internal consistency as measured by Cronbach's alpha coefficient was .75. Twenty-five items (26.3%) significantly discriminated between the groups. Group comparison tests (Wilcoxon Rank-sum Test) also indicated that six of the eight domains discriminated between the groups. CONCLUSION: In our sample, the instrument has reliable results which discriminate between the studied groups. These preliminary findings support future work toward the development of a Chilean version of this instrument.     

The intersectional gap: how bilingual students in the United States are excluded from inclusion

At the onset of nearly every American civil rights movement there are two pivotal messages: the first is the group’s claims of exclusion from the life that the privileged lead and the second is a demand to be included. In all cases the first step in creating sustainable change has been the recognition that society was functioning on a multi-tiered system that grants access to some but not to all. Currently there is a civil rights movement taking place that focuses on the integration of students with diverse ability levels. In the United States this movement is called Inclusion. Unfortunately, the primary focus of inclusion is on the integration of students with disabilities; thus children who represent intersectional identities are often passed over and continually left on the margins of inclusive classrooms, schools and society. This paper will focus on a subgroup of students who are currently being left behind in this movement: bilingual special education students. Due to the fact that separate policies exist to address their linguistic and academic needs bilingual students with disabilities fall into what can be considered an intersectional gap. This paper addresses how this gap came to be as well as offering recommendations for mending it.     

Academic anxieties: which type contributes the most to low achievement in methodological courses?

Students’ academic achievement in courses with a high mathematical content can be affected by their levels of trait, math and test anxiety. In this study, 180 university students were assessed on these types of anxiety and the relationships between them and students’ performance were evaluated. Higher levels of math anxiety were related to a low academic achievement, but a high level of test anxiety was related only to an increase in the number of errors. Moreover, although women reported higher levels of trait, math and test anxiety than their male peers, their academic achievement was similar. We conclude that math anxiety is the main emotional factor that can affect students’ performance in these courses and some proposals to help highly math-anxious students are discussed.     

Instructors’ teaching styles: relation with competences,self-efficacy,and commitment in pre-service teachers

Instructors’ teaching styles in higher education are an issue of major importance because these interactions affect students’ self-perceptions, involvement, and achievement. This study aimed to test a theoretical model of relations between perceived teaching styles (autonomy support, structure, and control) and competences, self-efficacy, and commitment in pre-service teachers; to assess the invariance of the model in two samples; and to analyze the mediated relations between these variables. Measures were collected from 842 Spanish pre-service teachers. As main research implications, teaching styles predicted acquired competences, competences predicted teaching self-efficacy, and self-efficacy predicted commitment to the profession. This model was equivalent in two samples of childhood and primary education pre-service teachers. Competences and self-efficacy mediated the relationships between variables. As practical implications, this study clearly shows the need for different interventions to enhance adequate instructors’ teaching styles and to foster among novice pre-service teachers the acquisition of professional competences, initial self-efficacy, and a good level of commitment to their profession.     

Reconciling rigour and impact by collaborative research design: study of teacher agency

This paper illustrates a new way of working collaboratively on the development of a methodology for studying teacher agency for social justice. Increasing emphasis of impact on change as a purpose of social research raises questions about appropriate research designs. Large-scale quantitative research framed within externally set parameters has often been criticised for its limited potential for capturing the contexts and impacting change, while smaller, locally embedded, mostly qualitative inquiries have been questioned on the grounds of their limited generalizability and sometimes compromising research rigour. New ways of working collaboratively are increasingly explored as a way of reconciling research rigour and impact. The paper presents the procedures for designing a study that is both methodologically rigorous and potentially impactful. Twelve researchers, practitioners and policy-makers in Scotland were extensively involved in designing a mixed-method study of teacher agency for social justice. The Critical Communicative Methodology was employed to establish egalitarian dialogue between researchers and practitioners. The procedures and the resulting research tools can be used in future studies, including large-scale quantitative analysis. The paper discusses the challenges of ownership, choice of methods, and knowledge transfer, that need to be addressed in these ways of working.     

Mexican Educators Survey on Anatomical Sciences Education and a Review of World Tendencies

Anatomical sciences curricula have been under constant reform over the years, with many countries having to reduce course hours while trying to preserve laboratory time. In Mexico, schools have historically been autonomous and unregulated, and data regarding structure and methods are still lacking. A national survey was sent by the Mexican Society of Anatomy to 110 anatomical sciences educators. The questionnaire consisted of 50 items (open and multiple choice) for gross anatomy, microscopic anatomy, neuroanatomy, and embryology courses in medical schools across Mexico. A clinical approach was the most common course approach in all disciplines. Contact course hours and laboratory hours were higher in Mexican anatomy education compared to other countries, with the highest reported contact hours for embryology (133.4 ± 44.1) and histology (125 ± 33.2). There were similar contact hours to other countries for gross anatomy (228.5 ± 60.5). Neuroanatomy course hours (43.9 ± 13.1) were less than reported by the United States and similar to Saudi Arabia and higher than the United Kingdom. Dissection and microscopy with histological slides predominate as the most common laboratory activities. Traditional methods prevail in most of the courses in Mexico and only a few educators have implemented innovative and technological tools. Implementation of new methods, approaches, and curricular changes are needed to enhance anatomical sciences education in Mexico.     

Aqueous extracts from Tenebrio molitor larval and pupal stages inhibit early hepatocarcinogenesis in vivo

Journal of Zhejiang University-SCIENCE B - 肝细胞癌 (HCC) 具有复杂的肿瘤内异质性,...     

Stimulus competition in the absence of compound conditioning

Most associative theories have assumed that stimulus competition occurs only between conditioned stimuli (CSs) that are trained in compound. The present research investigated the possibility of competition between two CSs that were individually paired to the same unconditioned stimulus (US). We used human subjects in an anticipatory suppression analogue to Pavlovian conditioning. Experiment 1 showed that X+ training followed by A+ training resulted in impaired responding to X. This did not occur when A+ training preceded X+ training. Experiment 2 replicated the basic effect and showed that it did not occur when the Phase 2 training consisted of A? instead of A+ nor when the A+ pairings occurred in a second context. Experiment 3 showed that A+ pairings occurring in a second context could still produce the effect when X was tested in the context in which the A+ pairings had occurred, but not when X was tested in a context different from that used for A+ training. Collectively, these results suggest that individually trained CSs may compete with each other when one of those CSs is more strongly activated by the test context than the other one.