Showing 9 results for Tahmasebi
Ali Akbar Jaberi Moghadam, Ebrahim Motesharee, Shahzad Tahmasebi Broujeni, Javad Afshari,
Volume 2, Issue 4 (12-2012)
Abstract
The aim of this research was to determine the effect of different training environments, type of skills and interactions on open and closed skills. The statistical population was all students living in dormitories of Tehran University in the 88-89 academic year. The sample was 60 people selected based on convenience sampling methods among students who had no experience in badminton skills (Long Service and clear). Based on pre-test subjects were matched in six groups of ten persons (noncompetitive, competitive, and combined). All of six groups performed a practice in defined medium for 10 sessions and each session were performed 40 times. The long-service tests were used to measure open badminton skill and clear test was performed to measure closed skill. Test scores of subjects were computed based on the mean of ten hits score. Descriptive statistics were used to determine the mean and standard deviations and to test research hypothesis, a two-way analysis of variance (ANOVA) with repeated measures and independent t-test were utilized. The result of ANOVA showed that exercise in each of the training environment increased acquisition and retention of each skill, but the levels are different (p<0.05). Also, Factorial ANOVA showed that the skills and environments does not have meaningful effects on acquisition and retention of skills while each skill interacts significantly with the training environment (p<0.05). In addition, exercising each of the skills in the same environments had different levels of acquisition and retention.
Karim Beglar, Mohammad Hossein Alizadeh, Mohammad Khabiri, Farshid Tahmasebi, Benyamin Ghelichpoor Dashliboroon,
Volume 3, Issue 6 (12-2013)
Abstract
Introduction: Injury is common incident in most of the sports and games. There are many reasons for the factors incident of injuries, the psychological aspect can be considered as one of them. Method: The aim of present study was to examine the relationship between psychological skills and severity of injuries in football players of Tehran premier league. 108 players of Iran premier league participated in the study. Research data was collected by injury report form and Ottawa mental skills assessment tool-3. Pearson correlation test at significant level of 95% were used for analyzing the data. Results: 90.7 % of them resulted in 1-3 days missing of match or training and there is inverse and significant relationship between psychological skills and its subdivisions (P=0/0001) and severity of sport injuries in football players. Conclusion: The findings of present study show that having high levels of psychological skills helps premier league players to handle stressful situations in sports through enhancing self-confidence and other psychological factors confronting harmful psychological factors such as stress and anxiety and lead to decrease in injury severity.
Shahzad Tahmasebi Boroujeni, Mehdi Shahbazi, Keivan Salehi,
Volume 3, Issue 6 (12-2013)
Abstract
The aim of this study was to measure the validity and reliability of perceived motivational climate in sport questionnaire (PMCSQ-2) for Newton and colleagues [2000[. For this purpose, random participants from 553 athletes 13 to 23 years were selected to complete the questionnaire. After applying the translate-retranslate technique, content validity ratio (CVR) and content validity index (CVI) confirmed by 10 Panels (CVR=0.66, CVI=0.97.For determining the construct validity, confirmatory factor analysis (CFA) based on structural equations was used, internal consistency of questionnaire was achieved by Cranach's alpha and Pearson correlation coefficient under test-retest method to study reliability of questionnaire. Results showed that the first model of PMCSQ-2(33 question (, wasn’t able to support the favorable fit and thus eliminated 6 problematic questions. Thereby the final model with 27 questions was included task-oriented climate (TOC) (effort/improvement, important role and cooperative learning) and ego-oriented climate (EOC) (unequal recognition and punishment of mistakes). Hereby, the Persian PMCSQ-2 (PPMCSQ-2) had acceptable fit index (RMSEA= 0.054, CFI= 0.9). Also, Internal consistency was acceptable (TOC=0.827, EOC=0.726 and PPMCSQ-2=0.618) and reliability of PPMCSQ-2(r=0.73) was affirmed. Therefore, PPMCSQ-2 can be used as a valid and reliable instrument to assess motivational climate in the Iranian athletes with the age range of 13 to 23 years.
Mr Mohsen Tahmasebi Poor, Dr Farideh Ashraf Ganguie, Dr Hamid Sajadi,
Volume 8, Issue 16 (12-2018)
Abstract
Volunteer Movement and deliver services to society is phenomenons of coeval universe.The aim of this research work was to present a pattern for Iran`s sports volunteer absorbance management information system requirement analysis. This investigation was of descriptive-analytic sort and in regard for practical goal, it was type of (UML) methodology and it used object-oriented design model (RUP). The questionnaire implements were prepared.The statistic-population consisted:All youth and sports ministry deputies, directors of all staffs All presidents, vice presidents and professors of Iran`s sports federations.Census method was opted for sampling. Validity of the survey was confirmed by sports management professors and software science professors. Reliability of questionaire was obtained by Brown-Spearman 87/ split-half experiment and Cronbach`s alpha ratio calculation 72/.Findings showed: sports volunteer absorbance management information system requirement was presented which contained: human resource, planning, registration and acceptance, introduction, financial and support, education and advocating, reward and retrain. Iran`s candidate stakeholders were identified and eventually requirement analysis pattern was presented. Identification of information needs is the basis of voluntary information system management, because if the knowledge of the system is not well done, effective interaction between the volunteers and the information system management will not come about. For this reason, the basis for the analysis of the requirements of the information management system of sports volunteers is the identification of information needs.
Mr Sajjad Azimi Panah, Dr Shahzad Tahmasebi Boroojeni,
Volume 9, Issue 17 (9-2019)
Abstract
Observing a model let learners to make a plan of action that can be used for learning motor skills. Moreover, self-talk is a conversation that performers use it either apparently or secretly in order to think about their performance and reinforce it. Therefore, the purpose of this study was to investigate the effect of observational learning, self-talk and combination of both on boy’s performance. The statistical samples of the present study included 60 students (12.25±1.24) with forth and fifth grade that were selected as available subjects. After volleyball AAHPERD pre-test, subjects divided into 6 groups: Instructional self-talk (STI), motivational self-talk (STM), observational learning (OB), combination of Instructional self-talk and learning observation (STI-OB), combination of motivational self-talk and observational learning (STM-OB) and control group (CO) and during one day, they were participated in specific intervention that planed for each group. On the first day of intervention, subjects participated in acquisition phase and acquisition test was taken, after 48 hours' retention and transfer test was Held. In each phase of study self-efficacy was examined. The results of two-way ANOVA revealed that there was a significant difference among all training groups with control group (p≤0.05). These results support the use of cognitive factors, self-talk and observational learning and the combination of observational learning and Instructional self-talk as learning facilitator.
Shahzad Tahmasebi Boroujeni, Masoumeh Karimnejat,
Volume 10, Issue 19 (8-2020)
Abstract
The aim of this study was to examine the effect of inherent and incremental ability theories feedback on dynamic balance in middle-aged women. 29 middle-aged women (age: 50-60) randomly assigned into two groups (inherent ability= 15 subjects, and incremental ability= 14 subjects). Both groups after the dynamic balance pretest (Timed Up and Go) received different instructions feedback. Immediate retention test at the end of sessions and delayed retention test was a day later. The transfer test conducted by cognitive and manual task. All tests performed on three stages and the score was recorded average each. The Mixed analysis of variance not significant difference between two feedbacks in dynamic balance (P= 0.249). In addition, analysis of variance with repeated measures showed that the dynamic balance in middle-aged women affected by both the inherent ability-based feedback (P= 0.0005) and incremental ability-based feedback (P=0.000003).
Dr Amin Amini, Dr Shahzad Tahmasebi Boroujeni, Dr Elahe Arabameri, Dr Hasan Ashayeri,
Volume 10, Issue 20 (11-2020)
Abstract
The ability to direct the gaze to optimal areas in the environmental context, at the appropriate time, is central to success in all sports. The aim of this study was to changes determine the elements of QE, during the run a reactivity launcher targeting skill, under different environmental demands. That was done to identify perceptual - cognitive effects performance-based infrastructure processes. Thus, 8 Athletes (22-28 Years old) with at least 5 years’ experience in dart throwing, in a counterbalanced manner performed under four target conditions of constraints environmental. Regulatory conditions (stationary/in motion) and inter-trial variability (present/absent) created four target conditions for reaction. During the run a launcher targeting skill and was continuously recorded characteristics related to gaze behavior in each scenario. In each condition, 10 trails 20 seconds conducted. Gaze behavior using an eye-tracking device Dikablis Professional Wireless model recorded and analyzed using DLab software information processing system and variance (ANOVA) with repeated measures. Results showed that there was significant between averages QE in four different environmental contexts (P≤0.001). The fastest QE onset was observed stationary – no inter-trial variability and QE offset and QE period belonged to in motion – no inter-trial variability and in motion– inter-trial variability. In general investigating factors involved in skillful performance in different implementation conditions in response to various constraints can be facilitator and effective in identifying important factors learning motor skills.
Yaser Khanjari, Elahe Arab Ameri, Mehdi Shahbazi, Shahzad Tahmasebi, Fariba Bahrami,
Volume 100, Issue 100 (10-2020)
Abstract
The aim of this study was to investigate simultaneous changes in EMG pattern during learning dart skill in dominant and non-dominant hands. The samples consisted of 10 non-athlete students with an average age of 23±2.5, which were divided into two group dominant hand (5) and non-dominant hand (5). Repeated measures ANOVA were used to measure data at the execution level and changes in EMG activity. The results showed a significant decrease in the absolute error of dart throwing at the performance level and an increase in EMG activity at the muscle level along with a decrease in muscle co-contraction in the acquisition and retention stages in both groups (P<.05). Also, there was no significant difference between EMG activity in the dominant and non-dominant hand groups after skill acquisition (P>.05). Generally, the results of this study showed that along with relatively constant changes in performance during dart skill learning, relatively constant changes in EMG patterns also occur, so that the concept of motor learning is also observed at the muscle level. Also, the results of this study supported the existence of the same motor program for dominant and non-dominant hand control, even in the conditions of bilateral transfer control.
Ms Soosan Taabodi, Dr Shahzad Tahmasebi Boroujeni, Dr Marjan Namjoo,
Volume 100, Issue 100 (10-2020)
Abstract
Previous research has indicated the effectiveness of parent-based and instructor-based interventions on children with developmental coordination disorder, but investigation of these two approaches in mentally retarded children has not been considered until. The purpose of this study was to compare the parent-based and instructor-based educational approach on motor proficiency and cognitive development of children aged 7 to 10 years with educable mentally retarded. 40 children with educable mental retardation in Jahrom city were selected by available sampling method and were divided into two experimental groups of parent-based (7.7±1.80) and instructor-based (8.10±0.91). In pre-test, participants performed a cognitive development test (my brain cognitive intervention software). After, all participants were tested motor proficiency (Bruininks Ozertsky) in school environment. The intervention for instructor-based group was done individually by the teacher in school and for the parent-based group, the intervention was done by parents at home. The intervention was performed for both experimental groups for 6 weeks and 3 sessions of 45 minutes each week. Analysis of variance was used to analyze the data. The results of data analysis showed that instructor-based exercises compared to parent-based exercises can improve motor proficiency, cognitive development (P≤0.05). Parent-based exercises can as well improve fine skills (P≤0.05).
