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Search Results: 1 - 10 of 6124 matches for " Chris Panagiotakopoulos "
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Word spelling assessment using ICT: The effect of presentation modality
Menelaos Sarris,Chris Panagiotakopoulos
Themes in Science and Technology Education , 2010,
Abstract: Up-to-date spelling process was assessed using typical spelling-to-dictation tasks, wherechildren’s performance was evaluated mainly in terms of spelling error scores. In the presentwork a simple graphical computer interface is reported, aiming to investigate the effects ofinput modality (e.g. visual and verbal) in word spelling. The software was constructed withthe view to measuring both spelling error and production time scores. The main purpose wasto not only to examine spelling strategies used by primary school children, but also to provideeducators with a useful tool that incorporates ICT technology. Within this framework, teacherscould exploit the benefits of computerised spelling assessment and adjust their teachingmethods towards a more effective approach of helping children master spelling skills. Theresults indicate that the presentation format has no impact on accessing abstract wordrepresentations, yet it accounts for variations in both time production scores and spellingerrors. Spelling in Greek, albeit being a relatively consistent orthographic writing system,seems to pose difficulties to young spellers. Our data suggest that the particularities of theGreek orthography may need to be tackled using other than the standard spelling-to-dictationtask used in primary schools. Computer-assisted teaching methods could exploit theirflexibility in presenting different input modalities and therefore serve as a useful tool inteaching spelling.
Effects of computer skill on mouse move and click performance
Chris Panagiotakopoulos,Menelaos Sarris
Themes in Science and Technology Education , 2008,
Abstract: 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.
Applying a Conceptual Mini Game for Supporting Simple Mathematical Calculation Skills: Students’ Perceptions and Considerations
Chris T. Panagiotakopoulos
World Journal of Education , 2011, DOI: 10.5430/wje.v1n1p3
Abstract: 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 challenge of achieving a high score more appealing, as success depended only on the cognitive skills of the user and not on any weaknesses or difficulties raised by the application itself. The findings of this study show that students would benefit from educational games and would be happy to work within an environment that motivated them and indirectly forced them to deal with mathematical operations while playing.
Student Dropout at the Hellenic Open University: Evaluation of the Graduate Program, "Studies in Education"
Dimitris Vergidis,Chris Panagiotakopoulos
International Review of Research in Open and Distance Learning , 2002,
Abstract: This study traces the root causes of dropout rates in one post-graduate course “Studies in Education,” offered by the Hellenic Open University (HOU). From our research findings, it was found that the main cause of dropping out stem from a combination of adult learners’ obligations, specifically balancing their academic workload with their employment commitments and family obligations (mainly for female students). The second reason for dropout rates among adult distance education learners include students’ miscalculation of the available time for studying and their underestimation of the extra effort required for effective learning. These reasons can be compared to the educational material, which, in general, was not considered overly difficult and did not appear to compel students to abandon their studies.
“Playing With Words”: Effects of an Anagram Solving Game-Like Application for Primary Education Students
Chris T. Panagiotakopoulos,Menelaos E. Sarris
International Education Studies , 2013, DOI: 10.5539/ies.v6n2p110
Abstract: 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.
A Contribution to the Hellenic Open University: Evaluation of the pedagogical practices and the use of ICT on distance education
Gerasimos Koustourakis,Chris Panagiotakopoulos,Dimitris Vergidis
International Review of Research in Open and Distance Learning , 2008,
Abstract: 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.
Hybrid Inflation in Supergravity with $(SU(1,1)/U(1)) ^{m}$ K$% \ddot{a}$hler Manifolds
C. Panagiotakopoulos
Physics , 1999, DOI: 10.1016/S0370-2693(99)00688-7
Abstract: In the presence of fields without superpotential but with large vevs through D-terms the mass-squared of the inflaton in the context of supergravity hybrid inflation receives positive contributions which could cancel the possibly negative K$\ddot{a}$hler potential ones. The mechanism is demonstrated using K$\ddot{a}$hler potentials associated with products of $SU(1,1)/U(1)$ K$\ddot{a}$hler manifolds. In a particularly simple model of this type all supergravity corrections to the F-term potential turn out to be proportional to the inflaton mass allowing even for an essentially completely flat inflationary potential. The model also allows for a detectable gravitational wave contribution to the microwave background anisotropy. Its initial conditions are quite natural largely due to a built in mechanism for a first stage of ``chaotic'' D-term inflation.
Blue Perturbation Spectra from Hybrid Inflation with Canonical Supergravity
C. Panagiotakopoulos
Physics , 1997, DOI: 10.1103/PhysRevD.55.R7335
Abstract: We construct a hybrid inflationary model associated with the superheavy scale of supersymmetric grand unified theories in which the inflaton potential is provided entirely by canonical supergravity. We find that the spectrum of adiabatic density perturbations is characterized by a strongly varying spectral index which is considerably larger than unity. Moreover, the total number of e-foldings is very limited. Implications of our analysis for other hybrid inflationary scenarios are briefly discussed.
Hybrid Inflation with Quasi-canonical Supergravity
C. Panagiotakopoulos
Physics , 1997, DOI: 10.1016/S0370-2693(97)00499-1
Abstract: We construct a hybrid inflationary model associated with the superheavy scale of the minimal supersymmetric standard model which is based on the simplest superpotential for symmetry breaking and in which the inflaton potential along the inflationary trajectory is essentially provided by quasi-canonical supergravity. The resulting spectrum of adiabatic density perturbations is blue and the duration of inflation sufficient but rather limited.
Hybrid Inflation and Supergravity
C. Panagiotakopoulos
Physics , 2000,
Abstract: Hybrid inflation is a natural scenario in the absence of supersymmetry. In the context of supergravity, however, it has to face the naturalness problems of the initial conditions and of the adequate suppression of the inflaton mass. Both can be successfully addressed in a class of models involving Kaehler potentials associated with products of SU(1,1)/U(1) Kaehler manifolds and "decoupled" fields acquiring large vacuum expectation values through D-terms.
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