Teaching and discussing about risk: seven elements of potential significance for science education

The present paper takes its point of departure in risk being a relevant content for science education, and that there are many different approaches to how to incorporate it. By reviewing the academic literature on the use and definitions of risk from fields such as engineering, linguistics and philosophy, we identified key elements of the risk concept relevant for science education. Risk is a phenomenon of the future that may be conveyed by our activity, it is something that may or may not take place. Hence, at the core of risk we find uncertainty and consequence. Furthermore, the elements of probability and severity are relevant modifiers of the consequence, as well as both subject to uncertainty. Additionally, in framing, understanding and decision-making on risk, as individuals or society, we need to acknowledge that risk has both objective and subjective components, lying in the interface between knowledge and values. In this paper, we describe how these key elements were derived from the literature and derive a schematic model of the risk concept for the purpose of science education. We further discuss how this model may assist in planning, execution and evaluation of teaching activities explicitly or implicitly involving risk issues.     

A Cross-Cultural Study of the Self-Confidence of Counselors-in-Training

In this era of globalization, cross-cultural comparison studies could help counselor training programs enhance educational opportunities that are informative, supportive, and culturally responsive to students. Counselors-in-training in both the United States and South Korea were sampled in this study assessing self-esteem (individual and collective) and counselor activity self-efficacy (CA self-efficacy). Results indicated that American students endorsed higher levels of collective self-esteem and CA self-efficacy compared to Korean students. Age was positively correlated with CA self-efficacy in both the American and Korean samples. Additionally, the variable of supervision hours and internship experience was positively correlated with CA self-efficacy for American students, but showed no relationship with CA self-efficacy for Korea students. Implications for understanding the cultural differences of counseling-trainees’ self-confidence and the need for conducting cross-cultural comparison studies to provide insights about the training and development of trainees in cross-cultural settings are discussed.     

Learning to collaborate in a peer-tutoring situation: Who learns? What is learned?

The issue of “collaborating to learn” is tackled by analysing a peer-tutoring situation aimed at providing help to students with learning difficulties. The corpus consists of a six-lesson cycle between a 15 year-old student and her 14 year-old tutee who has difficulties with German. The analysis shows that the tutor and the tutee interactively construct the asymmetry and complementarity of their roles. As a consequence, what seemed at first sight to be the tutor’s discursive and guidance abilities appears, upon closer examination, to be the result of the students’ interactional work. In this particular case, the mode of collaboration which is achieved results in the tutor taking charge of the major part of the cognitive work.     

Can Children Do Philosophy?

Some philosophers claim that young children cannot do philosophy. This paper examines some of those claims, and puts forward arguments against them. Our beliefs that children cannot do philosophy are based on philosophical assumptions about children, their thinking and about philosophy. Many of those assumptions remain unquestioned by critics of Philosophy with Children. My conclusion is that the idea that very young children can do philosophy has not only significant consequences for how we should educate young children, but also for how adults should do philosophy; and that further research is urgently needed.     

Gross Motor Competence and Peak Height Velocity in 10- to 14-Year-Old Canadian Youth: A Longitudinal Study

The objective of this study was to evaluate gross motor competence and growth spurt in Canadian youth. Eighty-two children (38 boys, 44 girls) were assessed over a time period of five years. Growth rate was measured quarterly; motor competence was evaluated once per year using the Bruininks-Oseretsky Test of Motor Proficiency. Peak height velocity (PHV) occurred at a significantly younger age in the girls (11.3 ± 0.4 years) than the boys (13.4 ± 0.3 years; p < .001), and growth rate during PHV was significantly greater in the boys than the girls (2.8 ± 1.3 vs. 2.0 ± 0.7 cm/quarter; p = .003). Gross motor competence outcomes were significantly above the North American normative scores (p < .05) over the measured time period. After the occurrence of PHV, strength, strength/agility, and gross motor skill significantly decreased in girls (p < .01), and running speed/agility significantly decreased in boys (p < .05). This finding emphasizes that motor competence in pre-adolescent children may suddenly decrease after their growth spurt.     

ATP and phosphocreatine utilization in single human muscle fibres during the development of maximal power output at elevated muscle temperatures

In this study, we examined the effect of muscle temperature (Tm) on adenosine triphosphate (ATP) and phosphocreatine utilization in single muscle fibres during the development of maximal power output in humans. Six male participants performed a 6-s maximal sprint on a friction-braked cycle ergometer under both normal (Tm = 34.3 degrees C, s = 0.6) and elevated (T(m) = 37.3 degrees C, s = 0.2) muscle temperature conditions. During the elevated condition, muscle temperature of the legs was raised, passively, by hot water immersion followed by wrapping in electrically heated blankets. Muscle biopsies were taken from the vastus lateralis before and immediately after exercise. Freeze-dried single fibres were dissected, characterized according to myosin heavy chain composition, and analysed for ATP and phosphocreatine content. Single fibres were classified as: type I, IIA, IIAX25 (1 - 25% IIX isoform), IIAX50 (26 - 50% IIX), IIAX75 (51 - 75% IIX), or IIAX100 (76 - 100% IIX). Maximal power output and pedal rate were both greater (P < 0.05) during the elevated condition by 258 W (s = 110) and 22 rev . min(-1) (s = 6), respectively. In both conditions, phosphocreatine content decreased significantly in all fibre types, with a greater decrease during the elevated condition in type IIA fibres (P < 0.01). Adenosine triphosphate content was also reduced to a greater (P < 0.01) extent in type IIA fibres during the elevated condition. The results of the present study indicate that after passive elevation of muscle temperature, there was a greater decrease in ATP and phosphocreatine content in type IIA fibres than in the normal trial, which contributed to the higher maximal power output.     

An Examination of Sport Participation Tracking and Adult Physical Activity for Participants of the Michigan State University Motor Performance Study

ABSTRACT

Research tracking sport participation from youth to adulthood is relatively rare, as is research that tracks youth sport participation with regard to adult physical activity (PA) levels, especially in the United States. Aims of this study were: 1) To investigate the degree to which sport participation tracked across youth, adolescence, and early adulthood in a sample of participants from the Michigan State University Motor Performance Study (MPS), and 2) Determine if differences existed in their levels of adult PA relative to prior sport participation. In total, 256 (60.8%) former participants from the MPS completed follow-up surveys regarding routine sport participation and PA across the previous year. Sport participation tracked consistently from youth to college. Further, regardless of the level of youth sport participation, adult leisure time PA was relatively consistent among groups. Although the study did not directly test the influence of the MPS on subsequent adult outcomes, our findings suggest that participants’ past sport participation was not a good predictor of adult PA for those who were involved in a program that emphasized fundamental motor skills in youth. Further investigation of such programs can help to better inform their influence on adult PA.     

Influence of Adiposity and Maturation on the Motor Performance of Girls Aged 8 to 16 Years

ABSTRACT

Excess adipose tissue may impact the motor performance of youth. Therefore, the current study examined (a) if adiposityinfluenced performance in the jump and reach and 30-yard dash and (b) if maturation predicted motor performance. Participants (N = 267) included girls aged 8 to 16 years. Latent growth curves were used to assess changes in motor performance. Sum of skinfolds predicted jump and reach performance from age 8.5 to 10.5 years, 11.5–12.0 years, 13.0 years, and from age 14 to 14.5 years (b = ?0.013 to 0.051, p < 0.05). Sum of skinfolds predicted 30-yard dash performance from age 8.5 to 14.0 years and at age 15.5 years (b = 0.003 to 0.005, p < 0.05). Maturation did not predict performance. Future research should examine determinants that explain the link between adiposity and motor performance.     

Temporal processing,attention, and learning disorders

In a large sample (N = 439) of literacy impaired and unimpaired elementary school children the predictions of the temporal processing theory of dyslexia were tested while controlling for (sub)clininal attentional deficits. Visual and Auditory Temporal Order Judgement were administered as well as three subtests of a standardized attention test. The correlation between visual and auditory TOJ was only moderate, challenging the assumption of a general, cross-modal temporal processing deficit. Regression analyses revealed attention as a significant predictor of children's TOJ performance. Once attentional differences were accounted for, temporal processing made a significant but small contribution (3% of variance explained) to reading (but not spelling), but also to arithmetic achievement, indicating that the prediction is not specific to literacy skills. Phonology and Rapid Automatized Naming explained considerable variance even when introduced after TOJ, contradicting the assumption that the verbal deficits in dyslexia result from temporal processing problems. Multiple case studies of 40 children with serious deficits in temporal processing revealed no consistent group pattern. Problems in temporal processing do not necessarily lead to literacy impairment but might be a marker of minor deviances in brain development.