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Mehdi Namazizadeh, Mohammad Reza Shahabi Kaseb, Seyyed Mohammad Kazem Vaeze Musavi,
Volume 2, Issue 3 (8-2012)
Abstract
The purpose of this study was the comparison of the required time and repetition for the acquisition of simple and complex timed motor sequenced task (TMST) among various practical conditions and determination of suitable practical methods with respect to individual characteristics. One hundred and fourteen university students, with the age range of 19-25 years old, were divided in 4 groups according to Raven Intelligence test, Achievement Motivation Test, Reaction time and Purdue pegboard, and based on the first, second and third quadrants. Then they were randomly placed in one of the two groups of simple and complex TMST and also in one of the practical conditions of the interaction of the organization of practice (random, blocked, constant), and practical distribution (massed, distributed). The subjects trained 6 days under their specific practical condition of simple or complex TMST, in a way they reached to the acquisition criterion (accuracy %75, timing %25, stability %15) in a practical training block. The number of repetitions and passage of time before this criterion block were considered as the minimum required time and repetition for acquisition of TMST. The data were analyzed using two-factor analysis of variance, independent t-test and Xi - 2 test (=&alpha0.1). The results showed individuals with different characteristics have acquired simple TMST in blocked and massed condition (except group ) in average within 30 repetitions and 1347 minutes, and complex TMST in random and distributed condition (except group ) in 25 repetitions and 1228 minutes. In addition, the findings showed that the principles of practical programming is affected by both the complexity level of task and individual characteristics. At last, it seems there is a need of more studies on the combination effect of the environment, individual and task on the acquisition fine motor skills.
Mehdi Roozbahani, Seyyed Mohammad Kazem Vaez Mosavi, Hasan Khalaji,
Volume 2, Issue 4 (12-2012)
Abstract
The purpose of this study was to explore the effectiveness of the number of practice trials in determining the degree of task complexity. Sixty subjects according to the types of tasks (A-B) and receiving feedback (100%, omitted, self-control) were randomly divided into six groups.All of the subjects practiced 100 trials tasks in each day on first two days. Retention tests were performed during the second and third day and reacquisition tests were performed on the third day. Using ANOVA with repeated measures showed found that,all of the subjects improved across practice trials on both days but this improvement in B task was significantly better than A task on the second day. Subjects were significantly better in the second retention and reacquisition tests compare with first one’s, in addition subjects that practiced B task were better than those that practiced A task in the second retention test (p<0.05). Results indicate that A task was more complex than B task, and the optimal practice trials is required to understanding which task is complex.
Maryam Abdolshai, Ahmad Farokhi, Ali Akbar Jaberi Moghadan, Seyed Mohammad Kazem Vaez Mosavi, Anooshiravan Kazemnejad,
Volume 3, Issue 5 (4-2013)
Abstract
Recent evidence suggest that massive amount of practice of a skill results in the development of a specific memory representation that is distinguished by its enhanced performance capability relative to the other members of the same class that is uniqe and termed 'Especial Skill'. This study aimed to investigate the emergence of special skill and reevaluation the visual-context hypothesis using badminton players in three skill levels (expert, skilled, less-experienced). Subjects (10 players in each group, mean age=23.12 ±3.85 years) performered 100 backhand short serves at five distances (1.5, 2, 2.5, 3, 3.5 meters from net) in each of environmental conditions (normal and covered court). The regression analyze showed that accuracy in skilled group at 2 meters distance was significantly better than predicted by regression equation, supporting the especial Skill effect, but it wasn’t showed in two other groups. This specific advantage of practice at this point was not emerged at absence of visual cues that supported the visual-context hypothesis.
Ebrahim Norouzi, Fatemehsadat Hosseini, Seyed Mohammad Kazem Vaezmosavi,
Volume 10, Issue 19 (8-2020)
Abstract
The aim of present study is to investigate effect of the quiet eye and quiet mind training on the dart throw learning. Thirty young males were selected with 24.53 mean aged through convenience sampling and randomly divided into quiet eye group, quiet mind group and control group. The study was conducted in four phases, including: Pre-test, training in quiet eye and quiet mind training, retention 1, under pressure test and retention 2. Descriptive statistics, Mixed ANOVA and post-hoc Bonferroni correction were used to data analyze. The results of the study showed that radial error of all groups dwindled as the result of training. Moreover, the radial error of quiet group was lower than other groups and that of quiet mind group was lower control group. Likewise, quiet eye and mind groups were capable of maintaing their performance in the under-pressure test rather than control group. The results of this study suggest that quiet mind and quiet eye training would be beneficial as a tool to prime impilicit learning conditions.
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.
Habib Allah Hamedyan, Mehdi Namazi Zadeh, Seyed Mohammad Kazem Vaez Musavi, Marziye Balali,
Volume 13, Issue 25 (9-2023)
Abstract
The aim of this study was to investigate the effect of physical maturity and chronological age on the motor abilities of students aged 7-12 years. 600 students aged 7-12 years were selected in three age categories. To determine the state of physical maturity, the estimation of the percentage of adult height obtained at a certain age was used. Finally, the motor ability test was used to assess motor ability. The results of the present study showed that the effect of chronological age was significant for the variable of motor abilities in girls and boys studied. Also, the effect of maturity level was significant for the variable of motor abilities. Comparison of means showed that students born at normal maturity levels have higher mean motor ability than students born at early and late maturity levels. According to the results of the present study, the level of maturity has a significant effect on the performance of motor skills. Finally, the results of this study are limited to the current population and limited to the age range of 7-12 years in Tehran and do not represent all age groups.
Afsane Nejad Ghani, Mohammad Kazem Vaez Mosavi, Saleh Rafie,
Volume 15, Issue 29 (4-2025)
Abstract
Introduction and Aim: Physical literacy is a topic that has attracted the attention of sports and health science researchers in recent years, and research is necessary and important to promote physical literacy. In this regard, the aim of this study was to the effect of physical education classroom of dynamic schools on the development of physical literacy of 9-year-old students.
Methods: To achieve this goal, one class from dynamic schools (31 people) and one class as control group (34 people) were selected. To assess physical literacy, the Canadian Assessment of Physical Literacy was used, which evaluates general body literacy as well as the subcategories of daily behaviors, knowledge and understanding, physical competence, and motivation and self-confidence.
Results: The results of covariance analysis showed that there is no significant difference between the two groups for the variable of daily behavior (p=0.506) and knowledge and understanding (p=0.052). But this difference is significant on physical competence (p=0.010), motivation and self-confidence (p=0.01) and the total score of physical literacy (p=0.000). With this solution, all variables improved more in the experimental group than the control group from pre-test to post-test.
Conclusion: In general, the results of this study confirmed the positive impact of dynamic schools on physical literacy, which reveals the need to pay attention to the activities of dynamic schools. And its results can be used in schools and kindergartens.
