Effects of manipulating relative and absolute motion information during observational learning of an aiming task

In the visual perception perspective of observational learning, the manipulation of relative and absolute motion information in visual demonstrations optimally directs learners’ search towards appropriate task solutions. We assessed the effect of emphasizing transformational information and removal of structural information using point-light kinematic displays in approximating the model’s relative motion patterns. Participants viewed computer-simulated point-light demonstrations or normal video demonstrations before and intermittently throughout 100 acquisition trials with knowledge of results on an underarm modified-dart aiming task. On the next day, all participants performed 20 retention trials without demonstrations. The kinematics of spatial and temporal coordination and control variables were examined relative to the model’s action, as well as performance scores. The results indicated that approximation of the model’s spatial and temporal coordination and control patterns was achieved after observation of either type of demonstrations. No differences were found in movement outcomes. In a second experiment, the effects of manipulating absolute motion information by slowmotion demonstrations were examined relative to real-time demonstrations. Real-time demonstrations led to a closer approximation to the model’s spatial and temporal coordination patterns and better outcome scores, contradicting predictions that slow-motion displays convey intact relative motion information. We speculate that the effect of visual demonstration speed on action perception and reproduction is a function of task constraints ‐ that is, novelty or familiarity of relative motion of demonstrated activities.     

Vitamin C supplementation does not influence plasma and blood mononuclear cell IL-6 and IL-10 levels after exercise

Abstract

The aim of this study was to determine whether the highest vitamin C supplementation associated with complete bioavailability influences the plasma and blood mononuclear cell IL-6 and IL-10 response to exercise. A double-blinded study of supplementation with vitamin C was performed. After 15 days of supplementation with vitamin C (500 mg · day^?1, n = 16) or a placebo (n = 15), participants in the study completed a 15-km run competition. Blood samples were taken before and after competition. Oxidative stress markers, antioxidants, cortisol, IL-6 and IL-10 were determined in plasma or serum. IL-6 and IL-10 protein and mRNA levels were measured in blood mononuclear cells. Although higher plasma and blood mononuclear cell vitamin C levels were observed in the supplemented group when compared with the placebo one, the two groups showed identical exercise-induced changes in all the measured parameters. Exercise induced increased IL-6 and IL-10 levels in plasma and blood mononuclear cells. IL-6 and IL-10 mRNA levels in blood mononuclear cells increased after the competition. After recovery, IL-6 mRNA returned to basal levels and IL-10 mRNA levels remained elevated. In conclusion, exercise induced increased IL-6 and IL-10 production in blood mononuclear cells. However, vitamin C supplementation did not influence IL-6 and IL-10 response to exercise.     

Using growth models to monitor school performance: comparing the effect of the metric and the assessment

This paper investigates whether inferences about school performance based on longitudinal models are consistent when different assessments and metrics are used as the basis for analysis. Using norm-referenced (NRT) and standards-based (SBT) assessment results from panel data of a large heterogeneous school district, we examine inferences based on vertically equated scale scores, normal curve equivalents (NCEs), and nonvertically equated scale scores. The results indicate that the effect of the metric depends upon the evaluation objective. NCEs significantly underestimate absolute individual growth, but NCEs and scale scores yield highly correlated (r >.90) school-level results based on mean initial status and growth estimates. SBT and NRT results are highly correlated for status but only moderately correlated for growth. We also find that as few as 30 students per school provide consistent results and that mobility tends to affect inferences based on status but not growth – irrespective of the assessment or metric used.     

Cognitive processes and math performance: a study with children at third grade of basic education

The present study aims to examine the relationship between cognitive factors and mathematical achievement in primary education. Participants were 103 Portuguese third grade students, aged 8 and 9. All participants completed a battery for working memory (WMTB-C), a test of general intelligence (Raven's Progressive Color Matrices), a selective attention test (d2), and mathematical exercises (arithmetic story problems and measurement skills). Data suggested significant correlations between math performance, executive, visuospatial sketchpad and g factor. Our findings suggest the importance of the cognitive factors in two mathematical domains considered. In consonance with the research in this area, we conclude that working memory (WM) assumes an important role in different math curricular achievements.     

Harambee: Working Together to Engender Change in Communities of Color

Working with communities of color to find solutions to the problems they face is a complex and challenging task. The “It Takes a Village” concept and the Transtheoretical Model of Change (Prochaska, Norcross, and DiClemente 1994) were used by the authors of this article in their work to empower clients of color to effect change in their communities. The narratives by these authors, European-American and African-American practitioners and educators, incorporate accounts of advocacy and social justice initiatives as they describe their interactions with grassroots organizations, such as educational and faith-based institutions, within communities of color.     

‘Wounded memory’, post-war gender conflict and narrative identity: reinterpreting Reggio Emilia Schools’ origin stories

In this article, memory is examined as it relates to origin stories of the Reggio Emilia approach – an internationally renowned Italian education programme – and to the articulation of women’s experiences of gender and their narrative identity in this very particular context. The article shows that a number of women who partook in the founding of the Reggio Emilia schools suffer from what Ricoeur terms ‘wounded memory’, which occurs when public recognition and legitimisation of one’s own narrative is actively marginalised, suppressed or erased in historical, official and institutional accounts. The author describes this experience and feeling shared by the Reggio Emilia women who were interviewed and argues that this ‘wounded memory’ can be linked to a wider concern with gender inequality. The article concludes by presenting some of the missing accounts of leadership, creativity and initiative that were gathered among these women whose memory has been wounded.     

Against the odds: resilience in mathematics students in transition

This paper examines ‘resilience’ of mathematics students in transition from a sociocultural perspective, in which resilience is viewed as relational and in particular as a function of the social and cultural capital students may bring to the new field. We draw on two students’ stories of transition, in which we recognise elements traditionally viewed as ‘risks’ for mathematics students in transition into institutions where new demands are made. However, in each case it seems that some of their apparent background ‘risk factors’—coming from poorer socioeconomic backgrounds and disadvantaged schools—have come to serve to constitute capital, buttressing their particular resilience, as they provide a crucial kind of autonomy that is particularly valued in the new institution. We identify the learners’ reflexivity as having been crucial to this accumulation of capital and we discuss some educational implications.     

A Critical Co-Constructed Autoethnography of a Gendered Cross-Cultural Mentoring Between Two Early Career Latin@ Scholars Working in the Deep South

Multicultural mentoring has been suggested to support Latin@ faculty success in their careers, yet current literature on effective mentorships of Latin@ faculty is limited. This critical co-constructed autoethnography draws on critical race theory (CRT) and latin@ critical race theory (LatCrit) frameworks to highlight the lived experiences and key elements of an effective gendered cross-cultural mentoring relationship in a Latin@ pretenure faculty dyad working in a predominantly White institution of higher education located in the Deep South of the United States. Drawing upon a methodological rhythm of sorts, a Black scholar acts as a muse providing testimonios and interpretations of a relationship existing among Latin@ scholars in predominantly White intellectual spaces. Findings from this critical co-constructed autoethnography note that a safe colored space supports effective mentoring, familismo, personalismo, enabling effective cross-cultural mentorship.     

Assessing school supports for ELL students using the ECLS-K

Using a large and nationally representative sample of children, this study examined the association between the school resources available to English Language Learners and their academic trajectories from kindergarten through fifth grade. Particular attention was paid to the differences in services provided by schools with high, low, or no ELL student concentrations. Growth-curve modeling results indicated that ELL children started kindergarten with significantly lower reading and math scores compared to their English-speaking peers. However, ELL children improved their math scores fast enough that they were able to narrow the initial gap in math scores with their English-speaking peers by fifth grade. This was particularly true for ELL children in schools with either a high- or low ELL student concentration. In contrast, ELL children still had lower reading scores by fifth grade compared to their English-speaking peers. The results highlight the importance of school resources and services in improving ELL students’ academic trajectories. Directions for future studies are discussed.     

The affective lives of doubled-up Latinx youth: Influences of school experiences,familism, and ethnic identity exploration

Doubled-up Latinx youth experience many daily challenges associated with ethnic minority status and residential instability. Doubled-up youth share housing with noncustodial caregivers such as friends and/or extended family members primarily because of economic hardship and a breakdown in available parental support. Using data from baseline and 10 days of twice-a-day surveys, this study examined how in-school positive experiences, familism (i.e., a perspective that gives precedence to the family), and ethnic identity (i.e., affirmation, exploration, and resolution) influence after school positive (e.g., feeling joyful/happy) and negative (e.g., feeling stressed/anxious) affect among doubled-up Latinx youth (70% female; M_age = 16.5). Results indicate that in-school positive experiences were associated with more after school positive affect and less after school negative affect. In addition, youth with higher levels of familism reported experiencing less after school negative affect. However, gender moderated the relation of ethnic identity exploration and experiences of after school positive affect. Specifically, females with higher levels of ethnic identity exploration reported relatively lower levels of after school positive affect compared with males. Overall, study findings highlight the importance of both person-level and varying contextual influences on the affective lives of doubled-up Latinx youth.