Running mechanical alterations during repeated treadmill sprints in hot versus hypoxic environments. A pilot study

We determined if performance and mechanical running alterations during repeated treadmill sprinting differ between severely hot and hypoxic environments. Six male recreational sportsmen (team- and racket-sport background) performed five 5-s sprints with 25-s recovery on an instrumented treadmill, allowing the continuous (step-by-step) measurement of running kinetics/kinematics and spring-mass characteristics. These were randomly conducted in control (CON; 25°C/45% RH, inspired fraction of oxygen = 20.9%), hot (HOT; 38°C/21% RH, inspired fraction of oxygen = 20.9%; end-exercise core temperature: ~38.6°C) and normobaric hypoxic (HYP, 25°C/45% RH, inspired fraction of oxygen = 13.3%/simulated altitude of ~3600 m; end-exercise pulse oxygen saturation: ~84%) environments. Running distance was lower (P < 0.05) in HOT compared to CON and HYP for the first sprint but larger (P < 0.05) sprint decrement score occurred in HYP versus HOT and CON. Compared to CON, the cumulated distance covered over the five sprints was lower (P < 0.01) in HYP but not in HOT. Irrespective of the environmental condition, significant changes occurred from the first to the fifth sprint repetitions (all three conditions compounded) in selected running kinetics (mean horizontal forces, P < 0.01) or kinematics (contact and swing times, both P < 0.001; step frequency, P < 0.001) and spring-mass characteristics (vertical stiffness, P < 0.001; leg stiffness, P < 0.01). No significant interaction between sprint number and condition was found for any mechanical data. Preliminary evidence indicates that repeated-sprint ability is more impaired in hypoxia than in a hot environment, when compared to a control condition. However, as sprints are repeated, mechanical alterations appear not to be exacerbated in severe (heat, hypoxia) environmental conditions.     

Measuring teachers’ self-efficacy beliefs: Development and use of the TEBS-Self

This paper distinguishes between teacher efficacy and teacher self-efficacy beliefs and describes a need for theory and research-based measures of teachers’ self-efficacy beliefs that are grounded in the context of the classroom. To meet this need, a new measure of teacher self-efficacy beliefs, the Teachers’ Efficacy Beliefs System-Self (TEBS-Self), is described by the authors. Principal components analysis results are presented from three independent studies performed in the United States (n=2373 K-6 teachers) using the TEBS-Self.     

Ethics Review of Research Projects Involving Human Subjects

Maltreatment of subjects has led to the introduction of an ethics review process for research involving humans. There is a feeling that the bureaucratization of the process is too restrictive and that it may be hampering research. The function, duties, and effectiveness of ethics committees are examined, and it is contended that there are problems with the way that committees operate. The remit of committees needs to be clarified, and the paper presents guidelines for making decisions on ethical matters, with deontological considerations taking precedence over consequentialist ones. It is concluded that the functions and processes of ethics committees need to be modified.     

Doctoral students’ experiences leading to completion or attrition: a matter of sense,progress and distress

A central trend in qualitative studies investigating doctoral students’ dropout is to stress the importance of students’ integration and socialisation in their working environment. Yet, few of these studies actually compared the experiences of doctoral students who completed or quit their PhD. In order to overcome this limitation and identify the factors that differentiate these two groups, the present study interviewed 21 former doctoral students: 8 completers and 13 non-completers. The results show that what best differentiates these two groups of participants is the extent to which they feel that they are moving forward, without experiencing too much distress, on a research project that makes sense to them. We assume that this set of factors is central in the dropout process. Support from doctoral peers was found to play a positive role overall but did not contribute to differentiating the two groups, presumably because peers have a limited impact on dissertation progress. Supervisors’ support was central to the participants’ stories; it is thus assumed to play a role in the process, but this role is complex and needs further investigation. These results call for a stronger consideration of the doctoral task itself when investigating the process of persistence and attrition and for a more integrated framework that considers jointly both task- and environment-related aspects.     

Video production as a tool for raising educator awareness about collaborative teacher–parent partnerships

Background:?This article describes research undertaken with teachers working in a South African township school, where parental involvement is a persistent problematic issue.

Purpose:?The purpose of the study was to explore the use of video production as a tool for assisting teachers to explore their perceptions about parental involvement in education and how these perceptions impact on their relationships with parents.

Sample:?Nine teachers participated voluntarily in the study, seven from two different primary schools and two from the high school in the township. All the teachers were isiXhosa speaking and had grown up in communities similar to the one in which the school was situated.

Design and methods:?Following a participatory research approach, we guided the participating teachers to design and produce short videos about issues that they perceived to impact negatively on their teaching and learning. We then facilitated critical reflection on these videos, specifically exploring how they had portrayed the teacher–parent relationship in each case.

Results:?Through a content analysis of a structured focus group and their written responses to questions, we identified emergent themes that made it apparent that the participating teachers viewed parents in a negative light, indicating a lack of the respect that would be required for the formation and sustainment of co-operative relationships. These themes were then used to facilitate discussion to raise teacher awareness of how the teachers' perceptions of parents could hinder meaningful parental involvement.

Conclusion:?The article offers an example of how visual methodologies can be useful tools for beginning to raise teacher awareness around issues, as a precursor to helping teachers to take action to improve a given situation.     

Bridging the Gap between the Lab and the Classroom: An Online Citizen Scientific Research Project with Teachers Aiming at Improving Inhibitory Control of School‐Age Children

Online citizen science allows us to bridge the gap between researchers and nonresearchers and to improve the scientific literacy of nonresearchers. The aims of the present study were (a) to determine whether a 5‐week randomized control trial conducted by teachers in their classroom could improve 7‐ to 12‐year‐old children's inhibitory control (IC) and (b) to provide proof of concept that online scientific research projects can provide meaningful results in the context of education. As expected, children in the IC training group improved their IC efficiency to a greater extent than children in the control training group. We provide the first evidence that such online scientific research projects can be effective in improving children's IC abilities and bridge the gap between the lab and the classroom.