Are we promoting critical autonomous thinking? A discussion on conversational genres and whether they can help us answer this question

This work is based on the assumption that if the classroom is a space in which manifestations of critical autonomous thinking appear systematically, then it promotes that same kind of thinking by the students, in other contexts. But what count as manifestations of critical autonomous thinking, and how can we observe them? As Robert Young's Habermasian work on indoctrination and conversational genres seemed a promising conceptual framework for understanding classroom situations in this respect, we took it as a starting point for exploring answers to these questions. Our exploration, both through fieldwork and theoretical reflection, led us to some findings, among which are (1) the existence of new genres which refine the conceptual categories originally formulated by Young; (2) that analysis of function is not enough, requiring also a contents dimension with which one can study what critical autonomous thinking is promoted about, in particular classroom situations; and (3) that classroom situations can be more contradictory and fragmented than presupposed by the very idea of genre.     

Characterisation of best practices in the development of cross-curricular competences in Vocational Education and Training: case study in the Basque Country

This paper presents the most important results of a research project aimed at gathering empirical evidence on current efforts to foster and develop cross-curricular competences (CCC) in Vocational Education and Training (VET) Centres located in the Basque Country (Spain). The case study research method was used, with data being gathered by means of a questionnaire completed by 473 teachers from 61 centres, as well as 16 group interviews with management teams, 16 discussion groups with students and 4 with teachers, and 3 in-depth interviews. Three general conclusions can be drawn from the results: (1) There is no common way of understanding or defining CCCs among the teachers–students–management teams of VET centres; (2) Cycles are the ideal context in which to develop processes of pedagogical change which incorporate work on CCCs in an integrated manner; and (3) Assessment continues to be the most problematic curricular element. The study also highlights a more specific set of conclusions related to organisational characteristics, the teaching–learning process and the dynamics of educational innovation.     

Adaptation of Child Abuse Potential Inventory in Chile: analysis of the difficulties and challenges in the application in Chilean studies

OBJECTIVE: This paper describes two studies aimed at validating the Chilean version of Child Abuse Potential (CAP). The paper also discusses problems in what respects conceptualizing and detecting maltreatment within a process of research as it relates to a specific culture. METHOD: An instrument based on the Child Abuse Potential Inventory was administered to two different samples of 134 people and 280 people, respectively. Both studies are contrasted in terms of internal consistency, factor analysis, and the instrument's ability to discriminate between abusers and non-abusers. RESULTS: Both studies feature good internal consistency (.98 and .95) and a factor structure similar to that of the original instrument; however, the second study shows problems concerning correct subject classification. The contrast of both studies suggests that the instrument is suitable for discriminating between severe child physical abuse and very well-treated children. The indecision area of classification is 67%. CONCLUSION: The results of both studies highlight the need to conceptualize and operationalize child abuse within a specific cultural context. The distinction between abusers and non-abusers becomes more blurred in the less extreme cases.     

Socio‐scientific controversies and students' conceptions about scientists

This article discusses the results of a mainly qualitative study into possible impacts of recent controversial socio‐scientific issues on a group of Portuguese secondary school students regarding their conceptions about scientists. The 86 participants: (1) answered a questionnaire with open‐ended questions; and (2) wrote a science fiction story involving a group of scientists working on a particular situation of her/his choice. Next, semi‐structured interviews were carried out to clarify and discuss the ideas embodied in the stories and mentioned in the questionnaire. All data underwent a process of content analysis. The socio‐scientific controversies recently discussed, and the way science and scientists are depicted in the media, seem to have produced some impact on students' conceptions about scientists. Based on the results obtained, some remarks and educational implications are discussed.     

Grading Multiple Choice Exams with Low-Cost and Portable Computer-Vision Techniques

Although technology for automatic grading of multiple choice exams has existed for several decades, it is not yet as widely available or affordable as it should be. The main reasons preventing this adoption are the cost and the complexity of the setup procedures. In this paper, Eyegrade, a system for automatic grading of multiple choice exams is presented. While most current solutions are based on expensive scanners, Eyegrade offers a truly low-cost solution requiring only a regular off-the-shelf webcam. Additionally, Eyegrade performs both mark recognition as well as optical character recognition of handwritten student identification numbers, which avoids the use of bubbles in the answer sheet. When compared with similar webcam-based systems, the user interface in Eyegrade has been designed to provide a more efficient and error-free data collection procedure. The tool has been validated with a set of experiments that show the ease of use (both setup and operation), the reduction in grading time, and an increase in the reliability of the results when compared with conventional, more expensive systems.     

航天诱变对凤仙花SP3代叶绿素及可溶性糖含量的影响

对经过航天诱变的凤仙花SP3代6个实验植株与没有经过航天诱变的6个对照植株进行秋播比较．通过对凤仙花生理指标的测定,发现经诱变后的植株光合色素含量增长显著,特别是叶绿素a;可溶性糖含量显著减少．针对叶绿素a含量和可溶性糖量的负相关关系,利用灰色系统理论和统计回归分析,建立了回归模型,拟合了两者之间的函数解析式．用此关系式可以合理的预测叶绿素a和可溶性糖的含量．     

Binary Pathfinder: An improvement to the Pathfinder algorithm

The Pathfinder algorithm is widely used to prune social networks. The pruning maintains the geodesic distances between nodes. It has shown itself to be very useful in the analysis of, amongst others, citations in BIS (bibliometrics, informetrics, and scientometrics). It has even been proposed for the online display of the search results in an information retrieval system. However, its great time and space complexity limits its use in real-time applications and in networks of any considerable size.The present work describes an improved algorithm with considerably reduced time and space complexity. Its lower execution costs thus increase its applicability both in real time and to large networks.     

Students’ understanding of the number line / Estudiantes pensando en la recta numérica

We studied the conceptions of students coming from secondary education and university regarding the number line as a representation of real numbers. In the context of a wider questionnaire, 307 students were presented with a task consisting of two verbal items and one graphic item related to the number line. The students were all at different levels in their study of mathematics (in the third, fourth or fifth year of secondary education, or at the beginning or advanced stage of a university degree in mathematics, biology or physical education). A gradient in the depth of the students’ conceptions, associated with the level of their studies in mathematics, was found. This gradient extends from the estrangement of facing the problem or a conception of a drawn or physical matter line, which was associated with students with a lower level of mathematical studies, passing through a vision centred around potential numeric density or a line containing points (discrete), up to an instrumental conception of the line as supportive of magnitudes in advanced students of biology and focusing on continuity sustained by advanced students of mathematics.