Student–teacher closeness and conflict in students with and without special educational needs

Teachers play a key role in creating effective conditions for students to succeed in school. The quality of student–teacher relationships is consistently associated with social, emotional, behavioural and academic adjustment, and this is even more relevant for students with special educational needs (SEN), considering these students’ emotional, social and learning vulnerabilities. This study aimed to examine the associations between students’ externalising and internalising behaviour, social skills and academic performance, and teachers’ perceptions of conflict and closeness in their relationships with students with and without SEN. Data regarding 360 students in Year 3, Year 5 and Year 7 (169 students with SEN) were collected. Teachers (n = 74) reported on the student–teacher relationship and students’ social skills, behaviour problems and academic performance. Special education teachers (n = 38) provided information regarding the diagnosis and profile of functioning of students with SEN. Results showed that teachers’ reports of students’ social skills and externalising problems were the strongest predictors of closeness and conflict. Internalising problems and SEN status also predicted decreased closeness, despite smaller effects. Taken together, findings support the importance of professional development opportunities focusing on facilitating teachers’ relationships with students with perceived challenging behaviour.     

Do Over 200 Million Healthy Altitude Residents Really Suffer from Chronic Acid–Base Disorders?

As the oxygen tension of inspired air falls with increasing altitude in normal subjects, hyperventilation ensues. This acute respiratory alkalosis, induces increased renal excretion of bicarbonate, returning the pH back to normal, giving rise to compensated respiratory alkalosis or chronic hypocapnia. It seems a contradiction that so many normal people at high altitude should permanently live as chronic acid–base patients. Blood gas analyses of 1,865 subjects at 3,510 m, reported a P _aCO₂ (arterial carbon dioxide tension ± SEM) = 29.4 ± 0.16 mmHg and pH = 7.40 ± 0.005. Base excess, calculated with the Van Slyke sea level equation, is −5 mM (milliMolar or mmol/l) as an average, suggesting chronic hypocapnia. THID, a new term replacing “Base Excess” is determined by titration to a pH of 7.40 at a P _aCO₂ of 5.33 kPa (40 mmHg) at sea level, oxygen saturated and at 37°C blood temperature. Since our new modified Van Slyke equations operate with normal values for P _aCO₂ at the actual altitude, a calculation of THID will always result in normal values—that is, zero.     

Nutritional intake of elite football referees

Abstract

There is a paucity of dietary data in football referees. In this study, 23 elite main and assistant referees (34.4 ± 5.6 years) completed a 7-day dietary record during the competitive season. No nutritional intake differences were observed between main and assistant referees. Referees’ mean daily energy intake (DEI) was 2819 ± 279 kcal. The intake of proteins (1.7 ± 0.2 g · kg^?1), carbohydrates (4.1 ± 0.8 g · kg^?1) and fats (1.4 ± 0.2 g · kg^?1) represented, respectively, 18.4 ± 1.5%, 44.4 ± 4.4% and 34.6 ± 4.1% of the DEI. Carbohydrate intakes before, during and after exercise were 66 ± 42, 7 ± 15 and 120 ± 62 g. Daily carbohydrate, fibre, polyunsaturated fat and water intakes were below recommendations, while fat, saturated fat, cholesterol and sodium intakes were above recommended values. The prevalence of inadequate intake was high for vitamin E (96%), folate (74%), vitamin A (61%), vitamin C (39%), magnesium (26%) and calcium (22%). Carbohydrate intake before, during and after exercise were far from achieving the minimum recommended values. Most referees demonstrated a negligent behaviour of hydration during exercise. Referees would benefit from dietary education in order to optimise performance and health.     

Specificities of the artistic cultural labor market in Brazilian metropolitan regions between 2002 and 2010

This paper analyzes the singularity of artistic cultural sector workers in the Brazilian metropolitan labor market, considering the job satisfaction of artists that Throsby proposes in his work preference model of artist behavior (1994). We also examine the effect of public expenditures on the income of workers in the cultural sector. Using 2002 to 2010 data from the Monthly Employment Survey (PME) and administrative records from Finance of Brazil (FINBRA), we estimate a probit model and a wage equation. In our model, we estimate wages as a function of: (1) sociodemographic characteristics of workers, (2) a variable for informal jobs, (3) the number of working hours, (4) a variable for the worker having another job, (5) per capita expenditures on culture interacted with a dummy for artistic cultural workers, (6) interactive binary variables involving place of residence and artistic cultural workers and (7) the predicted probability obtained by the probit model. This probability is estimated based on the likelihood of working in a creative activity, considering both workers from the cultural sector and other workers, controlled by: (1) sociodemographic characteristics of workers, (2) characteristics of their jobs, (3) dummies for the metropolitan regions and (4) willingness of creative workers to work additional hours interacted with the number of hours worked. Our results show that workers in the cultural sector are likely to work longer hours when compared to workers in other sectors. For our wage equation, the results suggest that women earn relatively less than men and blacks earn less than whites. Furthermore, earnings increase with age and the level of education. Formal workers obtain higher earnings when compared to informal ones. Finally, an increase in the per capita public expenditure on the cultural sector raises the income of workers in artistic cultural occupations.     

Assessing collaborative work in a higher education blended learning context: strategies and students’ perceptions

This study examines students' views on a blended learning module developed and offered at the University of Aveiro. The paper presents the module and the strategies, tools, activities and assessment. In order to examine the effectiveness of the module, data were collected from reflections, postings and questionnaires. Findings document students’ opinions concerning the module, the activities and their learning. Students valued the module but expressed concerns in using the wiki tool, assessing collaborative work and in engaging in peer assessment activities. The results have practical implications for the design of collaborative activities and innovative assessment in blended learning environments.

Bewertung kollaborativer Arbeit in einem gemischten Hochschulbildungs‐Lernkontext: Strategien und Wahrnehmungen der Studenten

Diese Studie untersucht die Ansichten von Studenten auf einem gemischten Lern‐Modul, entwickelt und angeboten von der Universität Aveiro. Das Papier stellt das Modul und die Strategien, Tools, Aktivitäten und Bewertung vor. Um die Wirksamkeit des Moduls zu untersuchen, wurden die Daten von Reflexionen, Notizen und Fragebögen gesammelt. Die Ergebnisse dokumentieren die Meinungen über das Modul, ihre Aktivitäten und ihr Lernen. Studenten schätzten das Modul hatten aber Bedenken beim Wiki‐Tool, bezüglich des kooperativen Arbeitens, Bewertungen und Peer‐Bewertungs‐Aktivitäten. Die Ergebnisse haben praktische Folgen für das Design gemeinsamer Aktivitäten und innovative Bewertungen ?gemischter Lernumgebungen”.

L’évaluation du travail collaboratif dans un contexte d’enseignement universitaire mixte: le strategies et les perceptions des étudiants

La présente étude examine les opinions des étudiants sur un module d’apprentissage mixte (blended) mis au point et assuré à l’Université d’Aveiro. Cet article présente le module et les stratégies, les outils, les activités et l’évaluation. Pour déterminer l’efficacité de ce module, on a rassemblé des données à partir des réflexions, des envois et des questionnaires. Les éléments recueillis illustrent les opinions des étudiants à propos du module, des activités et de ce qu’ils ont appris. Les étudiants ont apprécié le module mais exprimé leur inquiétude quant à l’usage de l’outil wiki, de l’évaluation du travail collaboratif et de l’engagement dans des activités d’évaluation de leurs camarades. Ces résultats ont des retombées pratiques pour la conception des activités collaboratives et d’un mode d’évaluation innovant dans des environnements d’apprentissage mixte.

La evaluación del trabajo colaborativo dentro de un entorno de aprendizaje mixto (Blended Learning) en la enseñanza superior: estrategias y percepciones de los estudiantes

El presente estudio examina las opiniones de los estudiantes acerca de un módulo de aprendizaje mixto desarrollado y propuesto por la Universidad de Aveiro. El artículo presenta el módulo y las estrategías, herramientas, actividades y evaluación. Para determinar la eficacia del módulo se hizo una recogida de datos, basandose en reflexiones, mensajes y cuestionarios. Los resultados ilustran las opinones de los estudiantes acerca del módulo, de las actividades y de lo que han aprendido.Los estudiantes valoran el módulo pero expresaron su preocupación acerca del uso de la herramienta wiki, de la evaluación del trabajo cooperativo y de la dedicación a actividades de evaluación mutual. Esos resultados conllevan consecuencias prácticas para el diseño de actividades cooperativas y la evaluación innovadora en entornos de aprendizaje mixto.     

The Freirean factor

ABSTRACT

Why bother thinking about Freire today? Who cares about the accuracy or lack of it in the translation of his books? In 2018 after 50 years of the original publication of Pedagogy of the Oppressed, there is a large industry of people profiting from translating and repeating Freire’s ideas – we are well aware that this text is another small contribution to such industry – but we firmly believe that contemporary social scientists could greatly benefit from reflecting about Freire’s long-term powerful conceptual, pedagogical, and political impact, and in particular about the role of translations in the social sciences.     

Criterion-related validity of the 20-m shuttle run test in youths aged 13–19 years

Abstract

We assessed the agreement between maximal oxygen consumption ([Vdot]O_2max) measured directly when performing the 20-m shuttle run test and estimated [Vdot]O_2max from five different equations (i.e. Barnett, equations a and b; Léger; Matsuzaka; and Ruiz) in youths. The 20-m shuttle run test was performed by 26 girls (mean age 14.6 years, s = 1.5; body mass 57.2 kg, s = 8.9; height 1.60 m, s = 0.06) and 22 boys (age 15.0 years, s = 1.6; body mass 63.5 kg, s = 11.5; height 1.70 m, s = 0.01). The participants wore a portable gas analyser (K4b2, Cosmed) to measure [Vdot]O₂ during the test. All the equations significantly underestimated directly measured [Vdot]O_2max, except Barnett's (b) equation. The mean difference ranged from 1.3 ml · kg^?1 · min^?1 (Barnett (b)) to 5.5 ml · kg^?1 · min^?1 (Léger). The standard error of the estimate ranged from 5.3 ml · kg^?1 · min^?1 (Ruiz) to 6.5 ml · kg^?1 · min^?1 (Léger), and the percentage error ranged from 21.2% (Ruiz) to 38.3% (Léger). The accuracy of the equations available to estimate [Vdot]O_2max from the 20-m shuttle run test is questionable at the individual level. Furthermore, special attention should be paid when comparisons are made between studies (e.g. population-based studies) using different equations. The results of the present study suggest that Barnett's (b) equation provides the closest agreement with directly measured [Vdot]O_2max (cardiorespiratory fitness) in youth.     

Protective effects of therapeutic cold and heat against the oxidative damage induced by a muscle strain injury in rats

Abstract

The mechanisms of action of physical agents commonly used to treat skeletal muscle lesions are not well understood. In this study, we examined whether the modulation of oxidative stress is involved in the beneficial effects of cold and heat on gastrocnemius muscle strain injury. Adult male Wistar rats were submitted to a strain injury and treated with therapeutic agents in an isolated or combined form. Strain damage caused an increase in muscle and blood oxidative damage. We suggest that this oxidative damage might be related to the impairment of the muscle cell structure, since we observed a significant positive correlation between increased plasma creatine kinase activity and both oxidized dichlorofluoresceine and lipid peroxidation levels in muscle and blood. The intensity of the inflammatory response appears also to be an important factor in the genesis of oxidative damage immediately following a muscle strain injury. Therapeutic cold seems to be more effective in preventing the damage induced by a strain injury, possibly due to its capacity to control the impairment of muscle cell structure and to modulate the intensity of the inflammatory response that follows a muscle strain injury.     

Fairness,trust, and school climate as foundational to growth mindset: A study among Brazilian children and adolescents

Recent research has established the importance of children and adolescents developing a growth mindset for future success and motivation. This research tests believes about fairness, adult trust, and school climate that are theoretically foundational for establishing a cognitive connection between effort and outcome. Regressions and MANOVAS were conducted to understand the direct and indirect relationships between perceptions of justice, adult trust, school climate and growth mindsets.

The first study included 363 children from Brazilian public schools and the findings supported our hypothesis that adult trust partially mediates the relationship between justice perceptions and growth mindset. The second study included an adolescent sample (n?=?497) from more diverse backgrounds and included a measure of institutional mindset. In this study, school fairness and solidarity mediated the relationship between perceptions of justice on institutional growth mindset. This research can help inform educators and researchers of other constructs necessary to foster a growth mindset.