Meta‐evaluation in clinical anatomy: A practical application of item response theory in multiple choice examinations     

Milton Severo  Maria A. Ferreira Tavares 《Anatomical sciences education》2010,3(1):17-24

The nature of anatomy education has changed substantially in recent decades, though the traditional multiple‐choice written examination remains the cornerstone of assessing students' knowledge. This study sought to measure the quality of a clinical anatomy multiple‐choice final examination using item response theory (IRT) models. One hundred seventy‐six students took a multiple‐choice clinical anatomy examination. One‐ and two‐parameter IRT models (difficulty and discrimination parameters) were used to assess item quality. The two‐parameter IRT model demonstrated a wide range in item difficulty, with a median of ?1.0 and range from ?2.0 to 0.0 (25th to 75th percentile). Similar results were seen for discrimination (median 0.6; range 0.4–0.8). The test information curve achieved maximum discrimination for an ability level one standard deviation below the average. There were 15 items with standardized loading less than 0.3, which was due to several factors: two items had two correct responses, one was not well constructed, two were too easy, and the others revealed a lack of detailed knowledge by students. The test used in this study was more effective in discriminating students of lower ability than those of higher ability. Overall, the quality of the examination in clinical anatomy was confirmed by the IRT models. Anat Sci Educ 3:17–24, 2010. © 2009 American Association of Anatomists.  相似文献   

Proximity-to-goal as a constraint on patterns of behaviour in attacker-defender dyads in team games     

Headrick J  Davids K  Renshaw I  Araújo D  Passos P  Fernandes O 《Journal of sports sciences》2012,30(3):247-253

The aim of this study was to determine whether spatiotemporal interactions between footballers and the ball in 1 vs. 1 sub-phases are influenced by their proximity to the goal area. Twelve participants (age 15.3 ± 0.5 years) performed as attackers and defenders in 1 vs. 1 dyads across three field positions: (a) attacking the goal, (b) in midfield, and (c) advancing away from the goal area. In each position, the dribbler was required to move beyond an immediate defender with the ball towards the opposition goal. Interactions of attacker-defender dyads were filmed with player and ball displacement trajectories digitized using manual tracking software. One-way repeated measures analysis of variance was used to examine differences in mean defender-to-ball distance after this value had stabilized. Maximum attacker-to-ball distance was also compared as a function of proximity-to-goal. Significant differences were observed for defender-to-ball distance between locations (a) and (c) at the moment when the defender-to-ball distance had stabilized (a: 1.69 ± 0.64 m; c: 1.15 ± 0.59 m; P < 0.05). Findings indicate that proximity-to-goal influenced the performance of players, particularly when attacking or advancing away from goal areas, providing implications for training design in football. In this study, the task constraints of football revealed subtly different player interactions than observed in previous studies of dyadic systems in basketball and rugby union.  相似文献   

Robust regulation for a 3-DOF helicopter via sliding-mode observation and identification     

A. Ferreira de Loza  H. Ríos  A. Rosales 《Journal of The Franklin Institute》2012,349(2):700-718

This paper tackles the problem of robust output regulation for a 3-DOF helicopter. The considered system is subjected to model uncertainties and external perturbations. A sliding mode observer is used to estimate the state vector in finite time and identify the uncertainties and perturbations using the information of the equivalent output injection. Based on these estimations a robust regulation controller is designed. Experimental results show the feasibility of this approach.  相似文献   

Vocational behavior and development in times of social change: new perspectives for theory and practice     

Fred W. Vondracek  Joaquim Armando Gomes Ferreira  Eduardo Jo?o Ribeiro dos Santos 《International Journal for Educational and Vocational Guidance》2010,10(2):125-138

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Horizontal ground reaction forces to stationary running performed in the water and on dry land at different physiological intensities     

Cristine Lima Alberton  Stephanie Santana Pinto  Gabriela Neves Nunes  Douglas Guerreiro dos Santos Rau  Paula Finatto  Amanda Haberland Antunes 《European Journal of Sport Science》2017,17(8):1013-1020

The aim of the present study was to compare the peak anterior–posterior (Fy) and medio–lateral (Fx) ground reaction forces (GRFs) of women performing stationary running at different intensities in aquatic and dry land environments. Fourteen young women performed the stationary running exercise at three cadences (first ventilatory threshold, second ventilatory threshold and maximum effort, as determined during exercise in water) in aquatic and dry land environments. Two-way repeated measures ANOVA was used to analyse the data (α?=?.05). As a result, significantly lower peak Fy anterior, Fy posterior, Fx medial and Fx lateral values were observed for the aquatic environment, except for the Fy posterior at the first ventilatory threshold. Significant differences were observed between cadences in the peak Fy anterior, Fy posterior, Fx medial and Fx lateral values, with higher values for the cadence corresponding to maximum effort compared to the first ventilatory threshold, except for the Fy posterior and Fx medial in the aquatic environment. The results indicate that the horizontal GRFs are reduced in the aquatic environment and depend on the intensity of stationary running exercise performance.  相似文献   

Determination of a quantitative parameter to evaluate swimming technique based on the maximal tethered swimming test     

Rafael Soncin  Bruno Mezêncio  Jacielle Carolina Ferreira  Sara Andrade Rodrigues  Rudolf Huebner  Julio Cerca Serrão 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(2):248-257

The aim of this study was to propose a new force parameter, associated with swimmers’ technique and performance. Twelve swimmers performed five repetitions of 25 m sprint crawl and a tethered swimming test with maximal effort. The parameters calculated were: the mean swimming velocity for crawl sprint, the mean propulsive force of the tethered swimming test as well as an oscillation parameter calculated from force fluctuation. The oscillation parameter evaluates the force variation around the mean force during the tethered test as a measure of swimming technique. Two parameters showed significant correlations with swimming velocity: the mean force during the tethered swimming (r = 0.85) and the product of the mean force square root and the oscillation (r = 0.86). However, the intercept coefficient was significantly different from zero only for the mean force, suggesting that although the correlation coefficient of the parameters was similar, part of the mean velocity magnitude that was not associated with the mean force was associated with the product of the mean force square root and the oscillation. Thus, force fluctuation during tethered swimming can be used as a quantitative index of swimmers’ technique.  相似文献   

In-service teacher training to provide psychosocial support and care in high-risk and high-need schools: school-based intervention partnerships     

Liesel Ebersöhn  Irma Eloff  Ronél Ferreira 《师资教育杂志》2015,41(3):267-284

This article uses a South African case study to argue that postcolonial, emerging economy societies in transition often contain schools characterised as high risk and high need. Such schools require teachers to adapt to roles other than facilitating learning, such as psychosocial support and care, and which requires additional professional development. In the absence of structured teacher professional development programmes, alternatives are required to assist teachers. The paper describes a nine-year partnership between higher education researchers and teachers in high-risk and high-need schools in three South African provinces. The participatory reflection and action (PRA) study served as platform for a school-based intervention to assist in-service teachers to adapt to their additional responsibilities. Thematic analysis was used to identify the ways in which teachers’ adaptation to high risk benefitted from the programme, and self-determination theory is used to argue for a dynamic and interconnected relationship between the teachers’ demonstrated pathways to psychosocial support and care. The article argues that in socio-politically transforming societies where need is high for in-service teacher training and formal structures for teacher professional development may be limited, partnerships between researchers and teachers appear to be useful platforms for school-based interventions to support teacher resilience.  相似文献   

Homework and academic achievement across Spanish Compulsory Education     

José Carlos Núñez  Natalia Suárez  Rebeca Cerezo  Julio González-Pienda  Pedro Rosário  Rosa Mourão 《教育心理学》2015,35(6):726-746

Homework (HW) is one of the most common school-related activities among parents, students and teachers. However, the need to assign HW to students has been extensively debated. The present investigation examines the relationship between specific HW variables (i.e. amount of HW completed, time spent on HW and perceived quality of HW time management) and academic achievement, while controlling for students’ gender and grade level. Participants included 454 students (ranging from 10 to 16?years of age) from three schools in northern Spain. A multivariate analyses of variance and path analyses showed that the amount of HW completed decreased with increased schooling, as did students’ perceived quality of HW time management. Data from hierarchical regression analyses completed by path analyses provided evidence that time spent on HW conjointly with perceived quality of HW time management explains how academic achievement is mediated by the amount of HW completed. These findings deepen the understanding of the complex impact of time spent on HW and on academic achievement.  相似文献   

Educação Integral e Pedagogia Social: Reflexões Aproximativas Com Base No Contexto Brasileiro     

Érico Ribas Machado  José Leonardo Rolim de Lima Severo 《Journal of Latinos & Education》2015,14(2):116-124

As relações entre as políticas educacionais no Brasil e as discussões da Pedagogia Social se evidenciam a partir da análise crítica da implementação da Educação Integral em escolas brasileiras. Neste trabalho, a abordagem da análise documental permitiu acessar os conteúdos das políticas para relacioná-lo aos fundamentos da Pedagogia Social. Uma das conclusões é que a escola e as políticas que a ela se dirigem consideram cada vez mais aspectos sociais, gerando novas demandas formativas e a outra é referente ao debate nacional atual sobre a formação dos Educadores Sociais para atuarem em diferentes espaços educativos, incluindo o escolar.  相似文献   

Training Effects on Older Adults in Information and Communication Technologies Considering Psychosocial Variables     

Sónia Ferreira  Ana Torres  Óscar Mealha  Ana Veloso 《Educational gerontology》2015,41(7):482-493

The main aim of this study is to contribute knowledge about the impact of the use of information and communication technologies (ICT) on the self-concept, mood, and quality of life of institutionalized older adults in retirement homes and day care centers (Portuguese institutions). It also studies the influence of independent variables such as age; education; referral to the institution (own initiative, indicated by friends, indicated by family, indicated by social security); attendance schedule; and visits from family and friends. The study comprised 41 participants organized into two groups: 22 older adults in the ICT Group and 19 older adults in the Passive Control Group. There were three evaluation periods: before the onset of intervention and 11 and 22 months after intervention began. The results demonstrate that involvement with information and communication technologies produced positive effects on older adults’ social behavior and their self-perception of physical and environment facets of quality of life. Moreover, they suggest that there is a relationship between psychosocial variables and independent variables.  相似文献