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Francimar Martins Teixeira 《International Journal of Science Education》2013,35(5):507-520
This paper is concerned with children's conceptions of the structure and function of the human digestive system. It is based on data from an investigation carried out with 45 children between the ages of four and ten. The results indicated that (1) children possess biological knowledge as an independent knowledge domain from the age of 4; (2) the acquisition of the concept of digestion leads to a conceptual revision and enrichment; (3) the concept of transformation can constitute an obstacle to comprehension of the scientific model of the functions of the digestive system. 相似文献
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Our aim was to analyse the impact of the characteristics of words used in spelling programmes and the nature of instructional
guidelines on the evolution from grapho-perceptive writing to phonetic writing in preschool children. The participants were
50 5-year-old children, divided in five equivalent groups in intelligence, phonological skills and spelling. All the children
knew the vowels and the consonants B, D, P, R, T, V, F, M and C, but didn’t use them on spelling. Their spelling was evaluated
in a pre and post-test with 36 words beginning with the consonants known. In-between they underwent a writing programme designed
to lead them to use the letters P and T to represent the initial phonemes of words. The groups differed on the kind of words
used on training (words whose initial syllable matches the name of the initial letter—Exp. G1 and Exp. G2—versus words whose
initial syllable is similar to the sound of the initial letter—Exp. G3 and Exp. G4). They also differed on the instruction
used in order to lead them to think about the relations between the initial phoneme of words and the initial consonant (instructions
designed to make the children think about letter names—Exp. G1 and Exp. G3—versus instructions designed to make the children
think about letter sounds—Exp. G2 and Exp. G4). The 5th was a control group. All the children evolved to syllabic phonetisations
spellings. There are no differences between groups at the number of total phonetisations but we found some differences between
groups at the quality of the phonetisations. 相似文献
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Moura FA Martins LE Anido Rde O de Barros RM Cunha SA 《Sports biomechanics / International Society of Biomechanics in Sports》2012,11(1):85-96
The purpose of this study was to characterise Brazilian teams' coverage area and spread on the pitch while attacking and defending and to analyse the teams' organisation in tackle and shot on goal situations. We obtained the trajectories of 223 players in eight games with a tracking method. Team area was defined as the area of the convex hull formed by players' positions. Team spread was defined as the Frobenius norm of the distance-between-player matrix. We calculated teams' area and spread over time and in situations of shots on goal (n = 233) and tackles (n = 1897). While the players attacked, spread and area (median +/- confidence interval) ranged from 322.9 +/- 0.8 to 387.8 +/- 1.0 m and from 905.4 +/- 4.4 to 1407.6 +/- 5.5 m2, respectively. On defence, the values were smaller (p < 0.05) and ranged from 283.4 +/- 0.9 to 325.8 +/- 0.9 m and from 773.8 +/- 4.6 to 1158.4 +/- 5.5 m2 for the spread and the area. In defending circumstances, the teams presented a greater area and spread when they suffered shots on goal than when the teams performed tackles. In attacking situations, the teams presented a greater area and spread when they suffered tackles than when they performed shots on goal. The results allowed showing the attacking-defending interaction between Brazilian teams. 相似文献
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Margarida Alves Martins Cristina Silva 《European Journal of Psychology of Education - EJPE》2001,16(4):605-617
Following several studies on the relationship between phonological awareness, children’s knowledge of letter names and their understanding of the alphabetic code, we pose the hypothesis that children’s knowledge of letter names may contribute to their analysis of the oral segments of words, thereby enabling them to produce writing in which some of the sounds are represented by appropriate letters. The participants were 80-syllabic 5-year-old kindergarten children, who were assigned to 2 experimental and 2 control groups and submitted to phonological and letter knowledge tests. We asked the children in the experimental groups to write a set of words in which either the initial sound (Exp. G. 1) or the middle sound (Exp. G. 2) coincided with the name of a letter known by the child; the children in the control groups were asked to write a set of control words. The results show that the introduction of facilitating words prompts syllabic children to produce writing in which some of the sounds are represented by appropriate letters; Exp. G. 1 gave better results than Exp. G. 2. Finally, there is a positive relationship between the results achieved by children in phonological and letter name tests and the number of sounds they write phonetically. 相似文献
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This study investigated whether streetstyle blogs provide an alternative to the thin-ideal found in traditional media. We analyzed images of 481 individuals from 5 streetstyle blogs. The majority of women (72%) and men (62%) were coded as below-average weight. Most women (60%) positioned themselves in accordance with Goffman’s gender-role stereotypes. Further, men were portrayed as more facially prominent than women, indicating that men are valued for their intellect whereas women are valued for their bodies. Although these Web sites have been celebrated for their use of “ordinary people,” the results suggest that they promote the same body ideals found in mainstream media 相似文献
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The relationship between children’s TV consumption and literacy outcomes is currently unclear, as past research has identified both linear and curvilinear trends. One explanation for the contradictory results is the varying content children consume; specifically, researchers have argued that research-based educational TV programming should be positively related to literacy outcomes whereas non research-based programming should be negatively related to literacy outcomes (what we refer to as the validated curriculum hypothesis). To test this hypothesis, students in grades 4 and 5 N = 120) completed a survey assessing educational TV consumption and leisure reading/writing behaviors. The results upheld the validated curriculum hypothesis and revealed several key moderators including composite TV consumption and parents’ reading behavior. 相似文献
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Maria João Martins Inês Laíns Inês Leal Inês Pessanha Bruno Brochado 《Assessment & Evaluation in Higher Education》2019,44(1):66-79
The UK National Student Survey (NSS) is a sound and widely used instrument for assessing students’ academic experiences. We aimed to translate the NSS for Portuguese students and to validate the instrument in a sample of medical undergraduates. The research team translated and adapted the NSS for Portuguese students (NSS-P). The survey was administered on an online platform to 1,256 final-year students at eight Portuguese medical schools. A total of 329 medical students (69.9% female) replied to the NSS-P, a response rate of 26.2%. Confirmatory factor analysis showed that the original six-factor structure had an adequate fit to the data. Adequate internal consistency was observed for all the subscales. Medium to large correlations were found among all the subscale scores and between the subscale scores and the students’ overall satisfaction. Multiple regression showed that the scores on the Teaching, Organization and Management and Personal Development subscales significantly predicted the students’ overall satisfaction. Approximately 64% of the students reported being satisfied with the quality of their courses. Significant differences among the medical schools in their NSS-P scores were found. The NSS-P is a valid and reliable measure for assessing medical students’ perceptions of academic quality. 相似文献
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This article dialogues with Matthew Weinstein’s paper named “NGSS, disposability, and the ambivalence of Science in/under neoliberalism”, in which he explores the argument that at the same time the NGSS framework is largely identified with neoliberal discourse, it presents points of ambivalence and resistance within. In this dialogue, we focused on two topics that we believe are important for the discussion of the ambivalences highlighted in the author’s argument, namely: the the social production of indifference as a consequence of the neoliberal ideology and the production of a version of science streamlined for the neoliberal technoscientific job market within the ‘neoliberal ecosystem’. Based on the thesis of the Canadian philosopher Charles Taylor on ethics and on the concept of hybridism, we linked Weinsteins’ analysis to issues related to individualism and instrumental reason, pointing out that it is possible that the ambivalences highlighted by Weinstein are, in fact, a component of neoliberal discourse. Nevertheless we agree that this kind of text presents loopholes that allows practices oriented for social change and for the improvement of democracies in progress. We conclude that for those who dedicate themselves to reflect upon educational strategies to cope with the hegemonic model remains the challenge of finding spaces and times in the curriculum in order to explore the gaps in policy texts and, more important, to promote the experience of democratic practices throughout the school communities. 相似文献