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Sentiment Analysis to Track Emotion and Polarity in Student Fora
The purpose of this paper is to propose a data mining methodology for analysing data relating to the participation of students in the online forum of a postgraduate course at the Hellenic Open University. Data is migrated to MongoDB, a NoSQL database management system, and analysed using the rmongodb package of R statistical environment. We focus in sentiment analysis to extract the emotional knowledge of students' fora. Polarity and emotion are identified in messages and are classified as positive, negative or neutral. Messages are categorized and visualized in six basic emotions, as a multiclass approach in understanding students' written opinion. By identifying sentiment behaviour from students' discussion fora, we are able to assess the effectiveness of the learning environment to improve students' learning experience, tutors' instructional experience and the university's institutional strategic view.
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Measuring Engagement to Assess Performance of Students in Distance Learning
Organizations continuously invest in the analysis of accumulated data by linking their exploitation to more effective decision making. Higher education and especially distance learning as a large data tank, follows the technological and financial needs to involve more flexible data analysis environments and better data-informed decision capabilities. Shrinking public subsidies drives higher education to form a more competitive learning environment. Satisfactory user experience and personalized services require a quantitative and qualitative analysis of students' daily action in learning environments. The increasing adoption of Learning Analytics (LA) and Educational Data Mining (EDM) push the development of novel approaches and advancements in education sector. At the same time, the rapid disclosure of hidden knowledge and the immediate presentation of results to optimize personalized decision making is a challenge for the competitiveness of distance learning. The objective of this study is the analysis of processes, technologies and resources used in an annual module at the Hellenic Open University to provide stakeholders with the visibility of interactions and hidden value in students' interactions. LA technologies are used on large set of data that has been collected by a Moodle platform and carefully analyzed. Students' logins, replies and quizzes are blended with the average grade of the main written exercises during the academic year. The contribution of this work is the useful observations from the students' educational on-line activities as predictive factors for their academic performance.
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A Holistic View on Academic Wide Data through Learning Analytics Dashboards
We live in an era of ever developing technology which has led to a massive increase in the amount of data available. Every move, click, and swipe of a card creates a virtual image of our lives in the form of a personal mosaic. Through sophisticated methods applied on these data, companies are now able to predict whether their products will appeal to people and target their advertising and market with maximum profit. In thecompetitive and globalized environment of education, institutions have to attract, assess and guide their students. In Greece, the Hellenic Open University (HOU) offers its courses in an open and distance learning mode. In contrast to a traditional university where most of the interaction and teaching is taking place on a face-to-face basis, at HOU the learning processis mainly facilitated via multimodal technological pathways and systems. It is important to homogenize and integrate the data collected from these systems in order to utilize it by gaining knowledge and building on it. To accomplish this, we use a learning analytics methodology to analyze the data and automatically create a detailed and holistic image of student performance, tutor effectiveness, and administration efficiency. This is then visualized through learning dashboards which convey important information so that each party can take necessary action and help the institution to improve its standing in the competitive educational environment. We aim to use the information within the systems where it is derived, since this makes the process more user friendly and accessible to all those involved.
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A Predictive Analytics Framework as a Countermeasure for Attrition of Students
Attrition is one of the main concerns in distance learning due to the impact on the incomes and institutions reputation. Timely identification of students at risk has high practical value in effective students’ retention services. Big Data mining and machine learning methods are applied to manipulate, analyze, and predict students’ failure, supporting self-directed learning. Despite the extensive application of data mining to education, the imbalance problem in minority classes of students’ attrition is often overlooked in conventional models. This document proposes a large data frame using the Hadoop ecosystem and the application of machine learning techniques to different datasets of an academic year at the Hellenic Open University. Datasets were divided into 35 weeks; 32 classifiers were created, compared and statistically analyzed to address the minority classes’ imbalance of student’s failure. The algorithms MetaCost-SMO and C4.5 provide the most accurate performance for each target class. Early predictions of timeframes determine a remarkable performance, while the importance of written assignments and specific quizzes is noticeable. The models’ performance in any week is exploited by developing a prediction tool for student attrition, contributing to timely and personalized intervention.