ATriple Iron triathlon leads to a decrease in total body mass but not to dehydration

A loss in total body mass during an ultraendurance performance is usually attributed to dehydration. We identified the changes in total body mass, fat mass, skeletal muscle mass, and selected markers of hydration status in 31 male nonprofessional ultratriathletes participating in a Triple Iron triathlon involving 11.4 km swimming, 540 km cycling and 126.6 km running. Measurements were taken prior to starting the race and after arrival at the finish line. Total body mass decreased by 1.66 kg (SD = 1.92; -5.3 kg to +1.2 kg; p < .001), skeletal muscle mass by 1.00 kg (SD = 0.90; -2.54 kg to +2.07 kg; p < .001), and fat mass by 0.58 kg (SD = 0.78; -1.74 kg to +0.87 kg; p < .001). The decrease in total body mass was associated with the decrease in skeletal muscle mass (r = .44; p < .05) and fat mass (r = .51; p < .05). Total body water and urinary specific gravity did not significantly change. Plasma urea increased significantly (p < .001); the decrease in skeletal muscle mass and the increase in plasma urea were associated (r = .39; p < .05). We conclude that completing a Triple Iron triathlon leads to decreased total body mass due to reduced fat mass and skeletal muscle mass but not to dehydration. The association of decrease in skeletal muscle mass and increased plasma urea suggests a loss in skeletal muscle mass.     

Rowen's Birth Story: His and Her Versions

In this column, a father and a mother each share their unique version of their son''s natural birth.     

What are secondary students’ expectations for teachers in virtual school environments?

A recent evaluation of the new North Carolina Virtual Public School (NCVPS) in the USA revealed numerous expectations for virtual school teachers from secondary students. Specifically, students expected their teachers to actually teach rather than moderate a course shell, supplement course shells with content and projects that illustrate relevance, provide for both content and peer interaction, and respond to questions and provide feedback quickly. The data suggest a possible content‐related interaction where a limited course shell can be bolstered by a proactive teacher, but potentially flounder among teachers who do not expect or know how to supplement an online course. Data further suggest a potential communication‐related interaction where increased opportunities for student–student and student–teacher interaction could potentially decrease the actual or perceived need for individualized attention that is particularly challenging for virtual teachers to provide. These results can be used to establish teacher expectations and design professional development experiences that prepare teachers to undertake divergent roles unique to online instruction.     

A choice theory teaching and learning model for working with children of prisoners

The prison population has increased substantially in countries around the world and significant numbers of these prisoners are parents. Children of prisoners experience separation from the imprisoned parent. The separation and precursors to the separation often diminish these children's social‐emotional and educational well‐being. In this paper, the social‐emotional and educational functioning of children of prisoners is examined. Additionally, choice theory is described as a relevant theoretical teaching and learning model to facilitate the children's school‐related functioning.     

Personality of elite male and female chess players and its relation to chess skill

Whereas a lot of studies examine cognitive processes in chess players, personality profiles of elite chess players are still not described well. The aim of this study was to examine personality of strong chess experts and its influence on chess skill. We tested elite male and female chess players with Freiburg Personality Inventory Revised (FPI-R), which also provides population norms for males and females. Elite male players' personality profile did not significantly differ from the population norms. Female players were more satisfied with life, had less physical complaints and higher achievement motivation in comparison with female population norms. Personality was also related with chess skill but showed different patterns in males and females. Stronger male players were more introverted, while we found the opposite pattern in female players. These results indicate that personality plays an important role in the highest level of complex intellectual activities.     

Class-wide Positive Behavior Support in Preschool: Improving Teacher Implementation Through Consultation

As the number of young children displaying challenging behavior in early childhood grows, so too does the need to implement evidence-based practices that prevent challenging behavior. Positive Behavior Support (PBS) provides a framework of tiered interventions focused on promoting social-emotional development and preventing challenging behavior. This study investigated the effects of consultation on teachers’ implementation of universal PBS practices and children’s academic engagement. A multiple-baseline design was applied across four preschool classrooms serving children from 33 to 63 months of age. A strong relationship was documented between consultation and teachers’ implementation of PBS skills. High levels of academic engagement were maintained following consultation. Implications of the results are provided for applications of universal PBS practices in early childhood settings.     

Academic self-concept and emotion relations: Domain specificity and age effects

The present study investigated the relations between academic self-concepts and the emotions of enjoyment, pride, anxiety, anger, and boredom as experienced in mathematics, physics, German, and English classes (N = 1710; grades 8 and 11). In line with our hypotheses derived from appraisal-based emotion theories and self-efficacy research, within-domain relations between self-concepts and emotions were relatively strong and notably stronger within quantitative domains (mathematics and physics) than verbal domains (German and English). Also consistent with our hypotheses, stronger relations between self-concepts and emotions were observed among older students. Self-concept and emotion relations further differed as a function of the specific emotion assessed, with pride showing the strongest and boredom the weakest relations with academic self-concepts in the four domains assessed. Methodological and educational implications as well as directions for future research are discussed.