Debiaser for Multiple Variables to enhance fairness in classification tasks     

《Information processing & management》2023,60(2):103226

Nowadays assuring that search and recommendation systems are fair and do not apply discrimination among any kind of population has become of paramount importance. This is also highlighted by some of the sustainable development goals proposed by the United Nations. Those systems typically rely on machine learning algorithms that solve the classification task. Although the problem of fairness has been widely addressed in binary classification, unfortunately, the fairness of multi-class classification problem needs to be further investigated lacking well-established solutions. For the aforementioned reasons, in this paper, we present the Debiaser for Multiple Variables (DEMV), an approach able to mitigate unbalanced groups bias (i.e., bias caused by an unequal distribution of instances in the population) in both binary and multi-class classification problems with multiple sensitive variables. The proposed method is compared, under several conditions, with a set of well-established baselines using different categories of classifiers. At first we conduct a specific study to understand which is the best generation strategies and their impact on DEMV’s ability to improve fairness. Then, we evaluate our method on a heterogeneous set of datasets and we show how it overcomes the established algorithms of the literature in the multi-class classification setting and in the binary classification setting when more than two sensitive variables are involved. Finally, based on the conducted experiments, we discuss strengths and weaknesses of our method and of the other baselines.  相似文献   

Directed collaboration patterns in funded teams: A perspective of knowledge flow     

《Information processing & management》2023,60(2):103237

Collaborations in funded teams are essential for understanding funded research and funding policies, although of high interest, are still not fully understood. This study aims to investigate directed collaboration patterns from the perspective of the knowledge flow, which is measured based on the academic age. To this end, we proposed a project-based team identification approach, which gives particular attention to funded teams. The method is applicable to other funding systems. Based on identified scientific teams, we detected recurring and significant subgraph patterns, known as network motifs, and under-represented patterns, known as anti-motifs. We found commonly occurred motifs and anti-motifs are remarkably characterized by different structures matching certain functions in knowledge exchanges. Collaboration patterns represented by motifs favor hierarchical structures, supporting intensive interactions across academic generations. Anti-motifs are more likely to show chain-like structures, hindering potentially various knowledge activities, and are thus seldom found in real collaboration networks. These findings provide new insights into the understanding of funded collaborations and also the funding system. Meanwhile, our findings are helpful for researchers, the public and policymakers to gain knowledge on research(ers) evolution, particularly in terms of primordial collaboration patterns.  相似文献   

Skills policy for growth and development: The merits of local approaches in Vietnam     

《International Journal of Educational Development》2021

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Students’ achievement goals and beliefs of causes of success: Temporal relations and gender differences     

《Contemporary educational psychology》2021

According to the goal orientation model, students’ achievement goals and beliefs are interrelated. Within this framework, research and theory have so far assumed that achievement goals are associated with students’ beliefs of causes of success, the latter representing students’ subjective beliefs about the factors contributing to success at school. So far, this line of research has been restricted to a few cross-sectional studies. We examined the temporal relations between achievement goals (mastery, performance-approach, and performance-avoidance goals) and students’ beliefs of causes of success, the latter operationalized by asking the students to rate the subjective importance of diligence, effort, and ability for school success. Achievement goals and beliefs of causes of success were measured twice with a time lag of one school year with a sample of N = 2044 German secondary school students. Cross-lagged panel models were estimated to examine the temporal relations between achievement goals and beliefs of causes of success while controlling for students’ secondary school track, socio-economic status, and Grade Point Average. Former mastery goals were found to be positively related to later importance ratings of diligence for school success; former performance-approach goals were found to be positively related to later importance ratings of ability. Boys and girls were found to display similar relations among constructs but they showed differential mean levels on both the achievement goal constructs and the beliefs of causes of success. Implications for research on achievement goals and practice using intervention approaches are discussed.  相似文献   

Where do you come from,where do you go? Assessing skills gaps and labour market outcomes for young adults with different immigration backgrounds     

《International Journal of Educational Development》2021

Using PISA and PIAAC data from twelve OECD countries, we examine the gap in cognitive skills among immigrants and natives and evaluate how those differences have evolved over time. We also consider how demographics, family background and school quality explain the development of cognitive skills of young people with immigrant backgrounds. The results show, first, that some convergence in skills occurs between second-generation immigrants and natives over time. Second, demographics, family background and school quality variables all contribute to the achievement gaps across different groups.  相似文献   

大学生思政课自主学习面临的“微”干扰及应对研究     

朱景林 《当代教育理论与实践》2021,13(2):26-31

微时代大学生思政课自主学习享有网络信息带来的便捷,同时也面临网络裹挟的一些干扰。克服这些干扰还存在一些主要障碍,需要在提高学生意识形态的鉴别力、增强自主学习环境的塑造力、提高教师自身网络教育的驾驭力和提升网络学习的保障力等方面下功夫。  相似文献   

2018年世锦赛中日集体花球啦啦操成套创编比较研究     

刘秋蝶  盛小苗 《体育科技文献通报》2020,(6):147-148,163

本文采用文献资料法,视频分析法,专家访谈法,比较分析法和数理统计法等研究方法。对2018年世锦赛中日集体花球啦啦操成套创编进行比较研究,包括三大技术技巧难度(跳步、转体、柔韧与平衡)、连接难度(集体类、技巧类、层次等)、托举与配合(托举、配合)、基本手位等。力图对这些进行定量对比分析、探究,分析中日两国成套动作差异等,以期为国内成套花球舞蹈啦啦队练习的创作和编写提供参考。  相似文献   

日韩武技现代化对我国学校武术的启示     

张长念  张长思 《武汉体育学院学报》2020,54(3):63-69,91

时至今日,武术仍未能很好地进入校园,其原因何在,如何从柔道、跆拳道、空手道的成功现代化和国际化当中寻求启发,成为紧迫论题。主要运用文献资料法,基于对学校武术历史、现状的反思和日韩武技现代化的启示,对我国学校武术的根本问题和根本方略做出探讨。研究认为,学校武术开展的现状不能实现中华民族赋予它的文化使命,日韩武技现代化的经验可为我们提供启示——将传统意义上的搏杀武技改造为一项现代文明搏击项目,该项目需满足几个趋势保证安全文明化、保持技击本质性、具有游戏趣味性、彰显民族独特性。在此基础上,做出武术以太极推手形式进入校园的提案。  相似文献   

Knowledge and Forms in Plato's Educational Philosophy     

Mason Marshall 《Educational theory》2020,70(2):215-229

In this essay, Mason Marshall argues that Plato's views on Forms play a central role in his educational philosophy. In response to what certain commentators have recently written, Marshall contends that this interpretation not only is accurate but also is advantageous because of how it can help philosophy of education. He also addresses the view, proposed by one philosopher of education, that Plato believes that the most valuable sort of knowledge cannot be fully expressed in words and that the objects of this knowledge are something other than transcendent Forms. Preferable to that view, Marshall argues, is the idea that Plato wants knowledge of Forms which is nonrepresentational.  相似文献   

Methods for assessing higher education research team collaboration: comparing research outputs and participant perceptions across four collaborative research teams     

Nick Kelly  Joanne Doyle  Marisa Parker 《高等教育研究与发展》2020,39(2):215-229

ABSTRACT

This article suggests that situations in which multiple research teams are convened under similar conditions present an opportunity to discover factors that lead to productive collaboration. It argues that social network analysis of research team outputs becomes more valuable when paired with data about research participant perceptions; and that any variables used as indicators of collaboration need to be calibrated using datasets from multiple studies with cross-team comparisons. The article provides an example of the kind of methodology needed to achieve this, describing a study with data from four research teams based at an Australian university campus, reporting their research performance over four years under conditions in which many variables were controlled and with results augmented by a survey of participant perceptions. Findings from the study indicate that there were exceptions to hypothesized associations between participant perceptions of collaboration and specific social network analysis measures over co-authorship data. The article suggests that, given the methodological challenges of studying research teams in the field, multiple datasets combining findings such as those in the present study are a path towards the development of indicators of productive higher education research collaboration.  相似文献