Chris Panagiotakopoulos - University of Patras

Chris Panagiotakopoulos - University of Patras
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Chris Panagiotakopoulos
University of Patras
Department of Primary Education
Faculty Member
Hellenic Open University
School of Humanities
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University of Patras, 26504, University Campus
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Papers by Chris Panagiotakopoulos
Χρήση της μεθοδολογίας PBL στην κατασκευή εκπαιδευτικού βίντεο: Μία εμπειρική μελέτη
Στην εργασία αυτή παρουσιάζονται τα αποτελέσματα επιμορφωτικού βιωματικού σεμιναρίου στη μεθοδολο...
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Στην εργασία αυτή παρουσιάζονται τα αποτελέσματα επιμορφωτικού βιωματικού σεμιναρίου στη μεθοδολογία PBL, στο οποίο συμμετείχαν ενεργοί εκπαιδευτικοί διαφόρων ειδικοτήτων τεχνικής-επαγγελματικής εκπαίδευσης. Στο σεμινάριο χρησιμοποιήθηκε η μεθοδολογία PBL για την εκπαίδευση των συμμετεχόντων στην κατασκευή εκπαιδευτικού βίντεο. Η συγκεκριμένη μεθοδολογία στηρίζεται στη συνεργατική διαδικασία επίλυσης πραγματικών προβλημάτων και είναι προσανατολισμένη στο μαθητή, προβλέποντας ασθενή καθοδήγηση από τον εκπαιδευτή και ισχυρή αυτενέργεια των εκπαιδευομένων σε κάθε φάση. Από την ανάλυση των αποτελεσμάτων προέκυψαν ενδιαφέροντα στοιχεία για τη στάση των συμμετεχόντων έναντι της μεθοδολογίας PBL και το ρόλο του εκπαιδευτικού σε ένα τέτοιο πλαίσιο με θέμα την κατασκευή εκπαιδευτικού βίντεο. Όπως διαπιστώθηκε, οι συμμετέχοντες έμειναν ικανοποιημένοι από τη συμμετοχή τους στο σεμινάριο, η μεθοδολογία PBL φάνηκε να κατανοήθηκε από τους συμμετέχοντες, οι οποίοι σε μεγάλο βαθμό έδειξαν διάθεση ν...
Το Αποθετήριο Διδακτικών Σεναρίων DSR: Περιγραφή, βασικές επισημάνσεις και αξιολόγηση της λειτουργίας του
Ένα διδακτικό σeνάριο πeριγράφeι ένα μαθησιακό πλαίσιο μe eστιασμένο γνωστικό αντικeίμeνο, συγκeκ...
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Ένα διδακτικό σeνάριο πeριγράφeι ένα μαθησιακό πλαίσιο μe eστιασμένο γνωστικό αντικeίμeνο, συγκeκριμένους eκπαιδeυτικούς στόχους, παιδαγωγικές αρχές και δράσeις που αξιοποιούν συγκeκριμένα eκπαιδeυτικά eργαλeία. Τα αποθeτήρια διδακτικών σeναρίων αποτeλούν μία κατηγορία ψηφιακών αποθeτηρίων, στα οποία αποθηκeύονται σeνάρια διδασκαλίας και παρέχουν μέσα, αποθήκeυσης και διαχeίρισης αυτών, μe σκοπό να υποστηρίξουν το έργο του eκπαιδeυτικού. Στην eργασία αυτή παρουσιάζονται οι δυνατότητeς του Αποθeτηρίου Διδακτικών Σeναρίων DSR και συζητούνται αποτeλέσματα της τeλικής αξιολόγησης του. Κατά την ανάπτυξη του DSR έγινe προσπάθeια για βέλτιστeς λύσeις, μe έμφαση στην ασφάλeια, στη λeιτουργικότητα και στην eκπαιδeυτική του αξία. Το DSR κατασκeυάστηκe eξ αρχής και eξ ολοκλήρου μe διαδeδομένeς γλώσσeς προγραμματισμού και σήμανσης για τον παγκόσμιο ιστό (HTML, PhP, JavaScript and XML), eνώ για την αποθήκeυση και διαχeίριση των δeδομένων χρησιμοποιήθηκe η βάση δeδομένων MySQL. Το DSR αξιολογeίτα...
Educational Software Evaluation : A Study from an Educational Data Mining Perspective
The International journal of Multimedia & Its Applications
, 2014
In this paper the complicated task of educational software evaluation is revisited and examined f...
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In this paper the complicated task of educational software evaluation is revisited and examined from a different point of view. By the means of Educational Data Mining (EDM) techniques, in the present study 177 of the most common evaluation standards that have been proposed by various researchers are examined and evaluated with regards to the degree they affect the effectiveness of educational software. More specifically, via the employment of prediction, feature selection and relationship mining techniques we investigate for the underlying rationale hidden within the data collected from experiments conducted at the Department of Education of the University of Patras with regards to the software evaluation task and the results of this study are presented and discussed in a quantitative and qualitative way.
Design and implementation of an electronic lexicon for Modern Greek
Literary and Linguistic Computing
, 2012
Natural language text analysis presupposes the encoding of morphological phenomena. In this artic...
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Natural language text analysis presupposes the encoding of morphological phenomena. In this article, we present some particularities of Modern Greek and the way these are encoded in the presented electronic lexicon. The project plan of its development combined both simple planning algorithms and more elaborate ones for the generation and recognition processes. The resulted lexicon exhibits fast access to its contents and easy content management. It is re-usable and modular enough to support existing NLP applications.
Analysis of lexical ambiguity in Modern Greek using a computational lexicon
Literary and Linguistic Computing
, 2013
Ambiguity is one of the most significant problems in Natural Language Processing. This difficulty...
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Ambiguity is one of the most significant problems in Natural Language Processing. This difficulty may not be apparent to native speakers because of their natural ability at resolving it using contextual information and common sense knowledge. In contrast, current computer applications are still lacking the ability to disambiguate complex texts efficiently. The most common type of ambiguity is lexical ambiguity, and this is noticed even in highly inflectional languages such as Greek. In the present article, all the patterns of predictable lexical ambiguity in Modern Greek Language are registered, verified and quantified as occurred in the Neurolingo computational lexicon, after a study of morpho-syntactic characteristics that differentiate the ambiguous words.
A Contribution to the Hellenic Open University: Evaluation of the pedagogical practices and the use of ICT on distance education
The International Review of Research in Open and Distributed Learning
, 2008
This study examines a) the methods used to structure the pedagogy necessary to underpin distance ...
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This study examines a) the methods used to structure the pedagogy necessary to underpin distance education delivery used by the Hellenic Open University (HOU); b) the adoption of pedagogical and epistemological conceptual systems HOU uses for the development of its pedagogical practices; and c) the role of information and communication technology (ICT), and the degree of ICTs incorporation into distance education delivery at HOU. This study shows that: a) in terms of providing rigorous course contents, strong framing exists between HOU’s various learning modules; b) in terms of pedagogical practices, there is a strong hierarchical relationship and framing between HOU’s academic staff and tutors, while conversely, framing is weaker between its tutors and students; c) in terms of ICT usage HOU, in general, uses technology for administration, while conversely, and depending on the program of study, it currently only has limited use for student learning.
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In the 2006-2007 academic year, HOU enrolled 15,026 undergraduates and 8,624 graduates, reflecting its significant reach in distance education.
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Exploiting Television in Open and Distance Learning: The Case of Undergraduate Courses in Cultural Studies at the Hellenic Open University
Ανοικτή Εκπαίδευση: το περιοδικό για την Ανοικτή και εξ Αποστάσεως Εκπαίδευση και την Εκπαιδευτική Τεχνολογία
, 2016
This study aims to explore the level of integration television has in the educational process of ...
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This study aims to explore the level of integration television has in the educational process of the undergraduate courses of cultural studies of the Hellenic Open University (HOU), based on Bourdieu’s theoretical standpoints. Acquisition of the research data was performed through a suitable questionnaire. In this research 394 students participated, from the courses «Studies in the European Culture» and «Studies in the Greek Culture». The principal findings of the research are the following: Television is not integrated in the institutional habitus of HOU, regarding the way distance learning is provided. Nevertheless, the majority of the students of the sample approached educational knowledge in a constructivistic way, finally integrating television, which comprises an element of modern humans’ habitus, in personal learning tactics. Finally, the sample’s students desire the exploitation of television from HOU, like many Hellenic Open Univers...
An Investigation of the Use of Information Communication Technologies (ICTs) by Teachers in the Primary Cycle of the European School Brussels III: An Empirical Study
British Journal of Education, Society & Behavioural Science
, 2014
Aims: This study aimed to explore the use of ICTs by teachers in the primary cycle of the Europea...
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Aims: This study aimed to explore the use of ICTs by teachers in the primary cycle of the European School Brussels III, a school where, since its establishment, educational culture has been associated with the use of ICTs in everyday teaching. Study Design: Self-reports on use of ICTs were collected from 43 teachers of the E.S.Br.3, Brussels. The teachers were asked to answer a questionnaire with closed and open questions, related to the use of ICTs in their school. Study Sample: The sample consisted of 43 out of 50 primary cycle teachers of the E.S.Br.3.
A Comparative Study of Dropout Rates and Causes for Two Different Distance Education Courses
The International Review of Research in Open and Distributed Learning
, 2004
This paper reports the results of a survey conducted to examine the root causes leading to studen...
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This paper reports the results of a survey conducted to examine the root causes leading to student dropout at a Greek distance education university. Data was gathered from two different courses – an undergraduate course leading to a Bachelors degree in Informatics (characterized by high dropout rates), and a postgraduate course leading to a Masters degree in education (characterized by low dropout rates). A comparative analysis of these two different courses revealed important similarities in dropout percentages and the reasons cited by students for dropping out. Our analysis also revealed important differences as well. This paper presents the results of a survey designed to investigate the relationship between dropout with intrinsic (student-related) factors such as sickness, work/ school conflict etc., and extrinsic (institutional-related) factors such as study methods and materials, educational approach, and tutor influence.
“Playing With Words”: Effects of an Anagram Solving Game-Like Application for Primary Education Students
The present study reports the basic characteristics of a game-like application entitled “Playing ...
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The present study reports the basic characteristics of a game-like application entitled “Playing with Words – PwW”. PwW is a single-user application where a word must be guessed given an anagram of that word. Anagrams are presented from a predefined word list and users can repeatedly try to guess the word, from which the anagram is derived, by placing (drag & drop) successively the given letters into the correct orthotactic order. Each effort is assessed as either correct or incorrect, while reaction and total time consumed are also recorded. The purpose of this game is both to entertain the user and to provide teachers with a simple computerized assessment tool. Summative evaluation results, based on 76 primary schoolchildren sample, indicate that the performance of anagram solving tasks explain a significant proportion of variance in reading fluency.
Open and Distance Learning: Tools of Information and Communication Technologies for Effective Learning
This paper discuses issues related to the use of tools of information and communication technolog...
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This paper discuses issues related to the use of tools of information and communication technologies into the field of open and distance learning. It offers an overview of the evolution of distance education and discusses the effects of information and communication technologies into the learning environments, procedures and the teaching material. It presents examples of learning resources in the World Wide Web and emphasizes the use of the Internet as a communication means. Finally it focuses on the Hellenic Open University case and presents the use of similar technologies in this university that offers open and distance education.
Applying a conceptual mini game for supporting simple mathematical calculation b l X Y Y b v b L M S a U L b c e a h d a e L
Mathematics is an area of study that particularly lacks student enthusiasm. Nevertheless, with th...
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Mathematics is an area of study that particularly lacks student enthusiasm. Nevertheless, with the help of educational games, any phobias concerning mathematics can be considerably decreased and mathematics can become more appealing. In this study, an educational game addressing mathematics was designed, developed and evaluated by a sample of 33 students of the fifth grade of a primary school. Each student played the educational game “Playing with Numbers ” (PwN), performing additions with integers, additions with decimals and multiplications with integers for a total of one hour, divided into four sessions. Next, the sample was asked to provide feedback regarding specific questions, and the analysis of the results showed that the PwN application is attractive and delivers usage. The attraction of the PwN game probably owes its success to its competitive element, as users are driven to achieve high scores. The PwN application was also found to be easy to use, and this made the chall...
A comparison between the ideas about computers , as held by acting teachers and by students training to become teachers , after some initial IT training
In the present paper a comparison between the ideas of serving teachers and teachers-to-be is pre...
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In the present paper a comparison between the ideas of serving teachers and teachers-to-be is presented: The ideas examined concern various aspects of information and communication technology (ICT). Some 164 acting teachers as well as 200 (teacher-trainee) students participated. All subjects have been given a course on computers and their uses, before their ideas have been examined. The computer course contained various computer literacy issues including basic aspects about the structure and function of computers. It must be stressed that although the course given to the teachertrainee students could be considered as a comprehensive “IT literacy” course, the one given to the acting teachers could hardly be judged as such, although all basics were taught and all subjects attended laboratory classes on ICT. From a constructivist point of view, when faced with the task of teaching computers to serving teachers and teachersto-be, our first aim should be to study their ideas about comput...
Word spelling assessment using ICT: The effect of presentation modality
Up-to-date spelling process was assessed using typical spelling-to-dictation tasks, where childre...
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Up-to-date spelling process was assessed using typical spelling-to-dictation tasks, where children’s performance was evaluated mainly in terms of spelling error scores. In the present work a simple graphical computer interface is reported, aiming to investigate the effects of input modality (e.g. visual and verbal) in word spelling. The software was constructed with the view to measuring both spelling error and production time scores. The main purpose was to not only to examine spelling strategies used by primary school children, but also to provide educators with a useful tool that incorporates ICT technology. Within this framework, teachers could exploit the benefits of computerised spelling assessment and adjust their teaching methods towards a more effective approach of helping children master spelling skills. The results indicate that the presentation format has no impact on accessing abstract word representations, yet it accounts for variations in both time production scores a...
Algorithm, Pseudo-Code and Lego Mindstorms Programming
This paper presents a pilot study which investigated the way prospective primary school teachers ...
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This paper presents a pilot study which investigated the way prospective primary school teachers handled the process of converting an algorithm - pseudo-code to a program while working with the programming environment of the Robolab programming tool of Lego Mindstorms. Participants had to program the behavior of a Lego robotic construction, using appropriate worksheets, analyzing the problem given, designing algorithms composing pseudo-codes and constructing programs in the Robolab environment. Observation of the participants' work showed that they handled all of the aforementioned processes productively and without any difficulties. They composed the algorithms easily in every step, they used the natural language to make the pseudo-codes and they converted them to a program in a simple manner. Participants found the activities very interesting from a pedagogical perspective.
Effects of Computer Skill on Mouse Move and Click Performance
This study focuses on the use of computers in the field of education. It reports a series of expe...
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This study focuses on the use of computers in the field of education. It reports a series of experimental mouse move and click tasks on constant and moving stimuli. These experiments attempt to explore the efficiency with which individuals of different skill level and age group perform using a mouse. Differences in performance between high-skill and low-skill computer users on low-level mouse operations tasks are examined. Four experiments are employed, using special software, in an effort to tackle the practical issue of mouse use and its constraints for both adults and younger users. Results showed within-subjects variation in performance on mouse operation tasks. Performance differences among groups were also observed.
Design, Implementation, and Evaluation of an Educational Software for the Teaching of the Programming Variable Concept
This study deals with the design, implementation, and evaluation of an educational software for t...
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This study deals with the design, implementation, and evaluation of an educational software for the teaching of the programming variable concept to 14-year-old students (third class of junior high school in Greece). The software consists of various activities in order to contribute to the students and help them understand the specific concept. The results of the research showed that the representation implemented through the software, of the computer RAM memory as one-column array storing the variables, helped the students to overcome their misconceptions and deeply understand the concept of the programming variable. Also the design of the software and the activities motivated the students and gave them the chance to learn and understand deeper than those who were taught with the suggested way through the school book.
Lessons Learned from the Use of the Slidewiki Opencourseware Platform in Different Learning Contexts
ICERI2018 Proceedings
, Nov 1, 2018
The SlideWiki platform is fostering open education by supporting the collaborative authoring, sha...
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The SlideWiki platform is fostering open education by supporting the collaborative authoring, sharing, reusing and remixing of open educational content online. This paper presents the lessons learned from piloting the SlideWiki platform in different learning contexts and scenarios. In particular, we describe the learning scenarios considered in each pilot and how these scenarios have been implemented with the use of SlideWiki. We then describe the methodology followed in each pilot, in terms of the authoring, teaching and learning activities performed by educators and learners using SlideWiki. Finally, the lessons learned from each pilot are discussed, focusing on the challenges faced in each pilot, how these challenges have been addressed, as well as the best practices that have emerged from the pilots regarding the collaborative authoring and sharing of open educational content.
A Learning Analytics Methodology for Detecting Sentiment in Student Fora: A Case Study in Distance Education
European Journal of Open, Distance and E-Learning
, 2015
Online fora have become not only one of the most popular communication tools in e-learning enviro...
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Online fora have become not only one of the most popular communication tools in e-learning environments, but also one of the key factors of the learning process, especially in distance learning, as they can provide to the students involved, motivation for collaboration in order to achieve a common goal. The purpose of this study is to analyse data related to the participation of postgraduate students in the online forum of their course at the Hellenic Open University. The content of the messages posted is analysed by using text mining techniques, while the network through which the students interact is processed through social network analysis techniques. Furthermore, sentiment analysis and opinion mining is applied on the same dataset. Our aim is to study students’ attitude towards the course and its features, as well as to model their sentiment behaviour over time, and finally to detect if and how this affected their overall performance. The combined knowledge attained from the af...
Evaluation of Scalable PRPL Schemes with a Native LSH Database Engine
Computer Science & Information Technology (CS & IT)
In this paper, we present recent work which has been accomplished in the newly introduced researc...
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In this paper, we present recent work which has been accomplished in the newly introduced research area of privacy preserving record linkage, and then, we present our L-fold redundant blocking scheme, that relies on the Locality-Sensitive Hashing technique for identifying similar records. These records have undergone an anonymization transformation using a Bloom filterbased encoding technique. We perform an experimental evaluation of our state-of-the-art blocking method against four other rival methods and present the results by using LSHDB, a newly introduced parallel and distributed database engine.
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