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Papers by Nikolaos Vernadakis

Research paper thumbnail of Αξιολόγηση της αποτελεσματικότητας της χρήσης του Η/Υ στη μάθηση των κινητικών δεξιοτήτων στη δευτεροβάθμια εκπαίδευση

Research paper thumbnail of AΣKHΣH ΣE ATOMA ME ANAΠHPIA - NEEΣ TEXNOΛOΓIEΣ Tρισέλιδες Eργασίες 20 ο Διεθνές Συνέδριο Φυσικής Aγωγής & Aθλητισμού ADAPTED PHYSICAL ACTIVITY - NEW TECHNOLOGIES Short Papers 20 th International Congress of Physical Education & Sport

Research paper thumbnail of Dimensionality of the Rosenberg Self-Esteem Scale among Greek Primary School Students

International Journal of Instruction, Oct 1, 2021

Research paper thumbnail of The effect of internal and external focus of attention on game performance in tennis

Research paper thumbnail of Blended learning in Undergraduate Education: The relationship between students’ perceived course interaction and their satisfaction

Research paper thumbnail of The Course Management System, e-Class at Democritus University of Thrace: Where do we Stand?

Research paper thumbnail of The Attentional Focus Impact on the Decision Making in Three-Game Situations in Tennis

World Academy of Science, Engineering and Technology, International Journal of Sport and Exercise Sciences, Nov 16, 2016

Research paper thumbnail of The relationship between students' attitudes and satisfaction in a “Physical Education in Early Childhood” blended course

etec.hawaii.edu

Abstract: With the recent growth of new information and communication technologies (ICTs), web ba... more Abstract: With the recent growth of new information and communication technologies (ICTs), web based course delivery has become a promising alternative for expanding the educational opportunities in the tertiary education. Blended learning -an alternative type of teaching- ...

Research paper thumbnail of Rosenberg Self Esteem Scale--Greek Version

Research paper thumbnail of Teaching Life Skills Through Volleyball Passing Skill to Children 9-11 Years Old

European Journal of Physical Education and Sport, Mar 4, 2022

Research paper thumbnail of The Effect of Nintendo Wii and Gender to Physical Education Students’ Balance Performance

The aim of this study was to explore whether there is a gender difference in the beneficial effec... more The aim of this study was to explore whether there is a gender difference in the beneficial effects of Nintendo Wii-Fit Plus, which is a series of sports video games used to support Physical Education students’ balance performance. Participants were twenty-six (n=26) undergraduate students, between the ages from 20-22 years old. Thirteen (50%) of the participants were male and thirteen were female (50%). The balance ability assessment was performed with the Biodex stability system. Participants voluntarily completed 24-minute Wii-Fit Plus sports video games 2 times per week for a total of 8 weeks. A one-way analysis of covariance (ANCOVA) was conducted to compare the adjusted mean score of the post-tests for the two gender groups. The results indicated that there was no significant difference between the two gender groups on balance post-test scores. These finding suggest that females will benefit as equally as males by using the Nintendo Wii-Fit Plus balance games. However, further...

Research paper thumbnail of The presence, enjoyment, mood experience, attitude and preference towards exergames scale in children with mild intellectual disability

Sport Sciences for Health, 2021

The purpose of this study was to examine the factor structure and cross-cultural validity of the ... more The purpose of this study was to examine the factor structure and cross-cultural validity of the self-report questionnaire of Ho, Lwin, Sng & Yee (2017) in a sample of Greek primary school students with mild intellectual disability (ID) using VR exergames. The questionnaire consisted of five scales, namely self-presence, mood experience, game enjoyment, attitude toward exergames and preference for future gameplay. Participants were 103 primary school students with mild ID aged 9–12 years old (males = 52.4%, females = 47.6%). Confirmatory Factor Analysis was undertaken through structural equation modelling to determine factorial validity. Convergent validity and internal consistency were calculated by considering the average variance extracted and the composite reliability respectively, while discriminant validity was estimated by maximum shared squared variance. Results indicated that the model was a good fit for the data as soon as seven items were dropped from the scale because of presenting poor consistency. Instrument was shown to have good internal consistency, appropriate convergent and discriminant validity. Evidence was found in support of the psychometric integrity of the Ho, Lwin, Sng & Yee (2017) questionnaire when implemented to children with mild ID.

Research paper thumbnail of The attentional focus impact on tennis skills’ technique in 10 and under years old players: Implications for real game situations

Journal of Human Sport and Exercise, 2018

Research paper thumbnail of The Effect of Nintendo Wii and Gender to Physical Education Students’ Balance Performance

The aim of this study was to explore whether there is a gender difference in the beneficial effec... more The aim of this study was to explore whether there is a gender difference in the beneficial effects of Nintendo Wii-Fit Plus, which is a series of sports video games used to support Physical Education students’ balance performance. Participants were twenty-six (n=26) undergraduate students, between the ages from 20-22 years old. Thirteen (50%) of the participants were male and thirteen were female (50%). The balance ability assessment was performed with the Biodex stability system. Participants voluntarily completed 24-minute Wii-Fit Plus sports video games 2 times per week for a total of 8 weeks. A one-way analysis of covariance (ANCOVA) was conducted to compare the adjusted mean score of the post-tests for the two gender groups. The results indicated that there was no significant difference between the two gender groups on balance post-test scores. These finding suggest that females will benefit as equally as males by using the Nintendo Wii-Fit Plus balance games. However, further...

Research paper thumbnail of Differences in self-reported perceived and objective measures of duration and intensity of physical activity for adults in skiing

The effect of physical activity (PA) on health is well documented. The assessment of PA is a valu... more The effect of physical activity (PA) on health is well documented. The assessment of PA is a valuable and important issue, however, there are several methodological issues among the available methods of measurement that may have implications for the prevention of specific diseases. The purpose of this study was to examine the differences between an objective method of measurement and the subjective estimation of the PA for novice skiers. Seventy-five students aged 19-21 years old with no previous experience in ski participated in this study. Participants wore a heart rate monitor during practice in order to record the exercise intensity. Simultaneously, a trained observer recorded their time on task. A day after the objective measurement, the participants filled a questionnaire in order to estimate their perceived exertion during practice as well as their perceived time on task. The results showed (1) differences between the observed time on task and the perceived recalled time, (2) no differences overall between the recorded and perceived recalled intensity of exercise but when groups were split according to their objective intensity a difference was found for each group respectively. Participants overall had overestimated the time on task, but they had underestimated the intensity of their effort recalled 1 day after their practice. These results raise the question whether a questionnaire as method of measuring PA is reliable, especially when it is used to estimate energy expenditure. However, further studies must be made in order to examine the implications of such a question.

Research paper thumbnail of The presence, enjoyment, mood experience, attitude and preference towards exergames scale in children with mild intellectual disability

Sport Sciences for Health, 2021

The purpose of this study was to examine the factor structure and cross-cultural validity of the ... more The purpose of this study was to examine the factor structure and cross-cultural validity of the self-report questionnaire of Ho, Lwin, Sng & Yee (2017) in a sample of Greek primary school students with mild intellectual disability (ID) using VR exergames. The questionnaire consisted of five scales, namely self-presence, mood experience, game enjoyment, attitude toward exergames and preference for future gameplay. Participants were 103 primary school students with mild ID aged 9–12 years old (males = 52.4%, females = 47.6%). Confirmatory Factor Analysis was undertaken through structural equation modelling to determine factorial validity. Convergent validity and internal consistency were calculated by considering the average variance extracted and the composite reliability respectively, while discriminant validity was estimated by maximum shared squared variance. Results indicated that the model was a good fit for the data as soon as seven items were dropped from the scale because of presenting poor consistency. Instrument was shown to have good internal consistency, appropriate convergent and discriminant validity. Evidence was found in support of the psychometric integrity of the Ho, Lwin, Sng & Yee (2017) questionnaire when implemented to children with mild ID.

Research paper thumbnail of Ocena przezimowania oraz stopnia porażenia pleśnią śniegową muraw trawnikowych w zależności od zastosowanego hydrożelu i rodzaju nawozu

Research paper thumbnail of The attentional focus impact on tennis skills’ technique in 10 and under years old players: Implications for real game situations

Journal of Human Sport and Exercise, 2018

Research paper thumbnail of Differences in self-reported perceived and objective measures of duration and intensity of physical activity for adults in skiing

The effect of physical activity (PA) on health is well documented. The assessment of PA is a valu... more The effect of physical activity (PA) on health is well documented. The assessment of PA is a valuable and important issue, however, there are several methodological issues among the available methods of measurement that may have implications for the prevention of specific diseases. The purpose of this study was to examine the differences between an objective method of measurement and the subjective estimation of the PA for novice skiers. Seventy-five students aged 19-21 years old with no previous experience in ski participated in this study. Participants wore a heart rate monitor during practice in order to record the exercise intensity. Simultaneously, a trained observer recorded their time on task. A day after the objective measurement, the participants filled a questionnaire in order to estimate their perceived exertion during practice as well as their perceived time on task. The results showed (1) differences between the observed time on task and the perceived recalled time, (2) no differences overall between the recorded and perceived recalled intensity of exercise but when groups were split according to their objective intensity a difference was found for each group respectively. Participants overall had overestimated the time on task, but they had underestimated the intensity of their effort recalled 1 day after their practice. These results raise the question whether a questionnaire as method of measuring PA is reliable, especially when it is used to estimate energy expenditure. However, further studies must be made in order to examine the implications of such a question.

Research paper thumbnail of Expected and perceived service quality at basketball stadiums in Greece

World Leisure Journal, 2009

Research paper thumbnail of Αξιολόγηση της αποτελεσματικότητας της χρήσης του Η/Υ στη μάθηση των κινητικών δεξιοτήτων στη δευτεροβάθμια εκπαίδευση

Research paper thumbnail of AΣKHΣH ΣE ATOMA ME ANAΠHPIA - NEEΣ TEXNOΛOΓIEΣ Tρισέλιδες Eργασίες 20 ο Διεθνές Συνέδριο Φυσικής Aγωγής & Aθλητισμού ADAPTED PHYSICAL ACTIVITY - NEW TECHNOLOGIES Short Papers 20 th International Congress of Physical Education & Sport

Research paper thumbnail of Dimensionality of the Rosenberg Self-Esteem Scale among Greek Primary School Students

International Journal of Instruction, Oct 1, 2021

Research paper thumbnail of The effect of internal and external focus of attention on game performance in tennis

Research paper thumbnail of Blended learning in Undergraduate Education: The relationship between students’ perceived course interaction and their satisfaction

Research paper thumbnail of The Course Management System, e-Class at Democritus University of Thrace: Where do we Stand?

Research paper thumbnail of The Attentional Focus Impact on the Decision Making in Three-Game Situations in Tennis

World Academy of Science, Engineering and Technology, International Journal of Sport and Exercise Sciences, Nov 16, 2016

Research paper thumbnail of The relationship between students' attitudes and satisfaction in a “Physical Education in Early Childhood” blended course

etec.hawaii.edu

Abstract: With the recent growth of new information and communication technologies (ICTs), web ba... more Abstract: With the recent growth of new information and communication technologies (ICTs), web based course delivery has become a promising alternative for expanding the educational opportunities in the tertiary education. Blended learning -an alternative type of teaching- ...

Research paper thumbnail of Rosenberg Self Esteem Scale--Greek Version

Research paper thumbnail of Teaching Life Skills Through Volleyball Passing Skill to Children 9-11 Years Old

European Journal of Physical Education and Sport, Mar 4, 2022

Research paper thumbnail of The Effect of Nintendo Wii and Gender to Physical Education Students’ Balance Performance

The aim of this study was to explore whether there is a gender difference in the beneficial effec... more The aim of this study was to explore whether there is a gender difference in the beneficial effects of Nintendo Wii-Fit Plus, which is a series of sports video games used to support Physical Education students’ balance performance. Participants were twenty-six (n=26) undergraduate students, between the ages from 20-22 years old. Thirteen (50%) of the participants were male and thirteen were female (50%). The balance ability assessment was performed with the Biodex stability system. Participants voluntarily completed 24-minute Wii-Fit Plus sports video games 2 times per week for a total of 8 weeks. A one-way analysis of covariance (ANCOVA) was conducted to compare the adjusted mean score of the post-tests for the two gender groups. The results indicated that there was no significant difference between the two gender groups on balance post-test scores. These finding suggest that females will benefit as equally as males by using the Nintendo Wii-Fit Plus balance games. However, further...

Research paper thumbnail of The presence, enjoyment, mood experience, attitude and preference towards exergames scale in children with mild intellectual disability

Sport Sciences for Health, 2021

The purpose of this study was to examine the factor structure and cross-cultural validity of the ... more The purpose of this study was to examine the factor structure and cross-cultural validity of the self-report questionnaire of Ho, Lwin, Sng & Yee (2017) in a sample of Greek primary school students with mild intellectual disability (ID) using VR exergames. The questionnaire consisted of five scales, namely self-presence, mood experience, game enjoyment, attitude toward exergames and preference for future gameplay. Participants were 103 primary school students with mild ID aged 9–12 years old (males = 52.4%, females = 47.6%). Confirmatory Factor Analysis was undertaken through structural equation modelling to determine factorial validity. Convergent validity and internal consistency were calculated by considering the average variance extracted and the composite reliability respectively, while discriminant validity was estimated by maximum shared squared variance. Results indicated that the model was a good fit for the data as soon as seven items were dropped from the scale because of presenting poor consistency. Instrument was shown to have good internal consistency, appropriate convergent and discriminant validity. Evidence was found in support of the psychometric integrity of the Ho, Lwin, Sng & Yee (2017) questionnaire when implemented to children with mild ID.

Research paper thumbnail of The attentional focus impact on tennis skills’ technique in 10 and under years old players: Implications for real game situations

Journal of Human Sport and Exercise, 2018

Research paper thumbnail of The Effect of Nintendo Wii and Gender to Physical Education Students’ Balance Performance

The aim of this study was to explore whether there is a gender difference in the beneficial effec... more The aim of this study was to explore whether there is a gender difference in the beneficial effects of Nintendo Wii-Fit Plus, which is a series of sports video games used to support Physical Education students’ balance performance. Participants were twenty-six (n=26) undergraduate students, between the ages from 20-22 years old. Thirteen (50%) of the participants were male and thirteen were female (50%). The balance ability assessment was performed with the Biodex stability system. Participants voluntarily completed 24-minute Wii-Fit Plus sports video games 2 times per week for a total of 8 weeks. A one-way analysis of covariance (ANCOVA) was conducted to compare the adjusted mean score of the post-tests for the two gender groups. The results indicated that there was no significant difference between the two gender groups on balance post-test scores. These finding suggest that females will benefit as equally as males by using the Nintendo Wii-Fit Plus balance games. However, further...

Research paper thumbnail of Differences in self-reported perceived and objective measures of duration and intensity of physical activity for adults in skiing

The effect of physical activity (PA) on health is well documented. The assessment of PA is a valu... more The effect of physical activity (PA) on health is well documented. The assessment of PA is a valuable and important issue, however, there are several methodological issues among the available methods of measurement that may have implications for the prevention of specific diseases. The purpose of this study was to examine the differences between an objective method of measurement and the subjective estimation of the PA for novice skiers. Seventy-five students aged 19-21 years old with no previous experience in ski participated in this study. Participants wore a heart rate monitor during practice in order to record the exercise intensity. Simultaneously, a trained observer recorded their time on task. A day after the objective measurement, the participants filled a questionnaire in order to estimate their perceived exertion during practice as well as their perceived time on task. The results showed (1) differences between the observed time on task and the perceived recalled time, (2) no differences overall between the recorded and perceived recalled intensity of exercise but when groups were split according to their objective intensity a difference was found for each group respectively. Participants overall had overestimated the time on task, but they had underestimated the intensity of their effort recalled 1 day after their practice. These results raise the question whether a questionnaire as method of measuring PA is reliable, especially when it is used to estimate energy expenditure. However, further studies must be made in order to examine the implications of such a question.

Research paper thumbnail of The presence, enjoyment, mood experience, attitude and preference towards exergames scale in children with mild intellectual disability

Sport Sciences for Health, 2021

The purpose of this study was to examine the factor structure and cross-cultural validity of the ... more The purpose of this study was to examine the factor structure and cross-cultural validity of the self-report questionnaire of Ho, Lwin, Sng & Yee (2017) in a sample of Greek primary school students with mild intellectual disability (ID) using VR exergames. The questionnaire consisted of five scales, namely self-presence, mood experience, game enjoyment, attitude toward exergames and preference for future gameplay. Participants were 103 primary school students with mild ID aged 9–12 years old (males = 52.4%, females = 47.6%). Confirmatory Factor Analysis was undertaken through structural equation modelling to determine factorial validity. Convergent validity and internal consistency were calculated by considering the average variance extracted and the composite reliability respectively, while discriminant validity was estimated by maximum shared squared variance. Results indicated that the model was a good fit for the data as soon as seven items were dropped from the scale because of presenting poor consistency. Instrument was shown to have good internal consistency, appropriate convergent and discriminant validity. Evidence was found in support of the psychometric integrity of the Ho, Lwin, Sng & Yee (2017) questionnaire when implemented to children with mild ID.

Research paper thumbnail of Ocena przezimowania oraz stopnia porażenia pleśnią śniegową muraw trawnikowych w zależności od zastosowanego hydrożelu i rodzaju nawozu

Research paper thumbnail of The attentional focus impact on tennis skills’ technique in 10 and under years old players: Implications for real game situations

Journal of Human Sport and Exercise, 2018

Research paper thumbnail of Differences in self-reported perceived and objective measures of duration and intensity of physical activity for adults in skiing

The effect of physical activity (PA) on health is well documented. The assessment of PA is a valu... more The effect of physical activity (PA) on health is well documented. The assessment of PA is a valuable and important issue, however, there are several methodological issues among the available methods of measurement that may have implications for the prevention of specific diseases. The purpose of this study was to examine the differences between an objective method of measurement and the subjective estimation of the PA for novice skiers. Seventy-five students aged 19-21 years old with no previous experience in ski participated in this study. Participants wore a heart rate monitor during practice in order to record the exercise intensity. Simultaneously, a trained observer recorded their time on task. A day after the objective measurement, the participants filled a questionnaire in order to estimate their perceived exertion during practice as well as their perceived time on task. The results showed (1) differences between the observed time on task and the perceived recalled time, (2) no differences overall between the recorded and perceived recalled intensity of exercise but when groups were split according to their objective intensity a difference was found for each group respectively. Participants overall had overestimated the time on task, but they had underestimated the intensity of their effort recalled 1 day after their practice. These results raise the question whether a questionnaire as method of measuring PA is reliable, especially when it is used to estimate energy expenditure. However, further studies must be made in order to examine the implications of such a question.

Research paper thumbnail of Expected and perceived service quality at basketball stadiums in Greece

World Leisure Journal, 2009