Hanid Salehi; Ahmadreza Movahedi; Gholamali Ghasemi Kahriz Sangi; Adnan Ghazanfari
Volume 3, Issue 2 , October 2012, , Pages 45-64
Abstract
The aim of this investigation was to compare the level and the pattern of attention demands of a volleyball jumping serve using a probe reaction time (RT) technique. 14 junior elite volleyball players performed 60 jumping serves (JS) with their preferred hand. Jumping serve was performance as the primary ...
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The aim of this investigation was to compare the level and the pattern of attention demands of a volleyball jumping serve using a probe reaction time (RT) technique. 14 junior elite volleyball players performed 60 jumping serves (JS) with their preferred hand. Jumping serve was performance as the primary task and verbal RT that was administered in four probe positions (PP) as secondary task. Results indicated a non-linear attention pattern in the performance of jumping serve so that probe RT was highest in pre-shot in run up (PP1) and in landing (PP4) while it was lowest in pre-jump stepping ahead (PP2) and pre-striking (PP3). According to the results, attention level in failed serves was lower than successful ones while the attention pattern was similar. It was concluded that attention deficit might be one reason for failing serves.
elham Khodadadi; ahmadreza Movahedi; hamid Salehi
Volume 3, Issue 2 , October 2012, , Pages 119-135
Abstract
The aim of the present study was to examine the effect of goal setting on learning volleyball serve in novice female university students. The study included 20 female students (aged between 20 and 22 who were not physical education students with no volleyball history) who were randomly assigned to a ...
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The aim of the present study was to examine the effect of goal setting on learning volleyball serve in novice female university students. The study included 20 female students (aged between 20 and 22 who were not physical education students with no volleyball history) who were randomly assigned to a goal setting or no goal setting group (n1=n2=10) using pretest scores. No goal setting group was provided with feedback on their performance while goal setting group received goal setting programs as well as feedback on their performance in training sessions. In the determined training condition, the two groups performed the task for 11 sessions, 20 trials each session. Both groups performed a pretest before the training protocol, acquisition tests during all sessions, an immediate retention test immediately after the last exercise session, and a delayed retention test after 10 days after the immediate test. AAHPERD volleyball serve (1976) was used to test the performance of the participants. Analysis of variance (ANOVA) with repeated measures, independent and paired t tests as well as SPSS software (version 11.5) were used to analyze the data. Results showed no significant difference in the task acquisition between the groups while the goal setting group showed significantly better task performance in the immediate and delayed retention tests indicating that goal setting training condition was much more beneficial for volleyball serve learning than no goal setting training condition.
Fatemeh Bahrami; Ahmadreza Movahedi; Afeifeh Silani
Abstract
The aim of the present study was to examine the hypothesis of the specificity of practice regarding training place (to determine whether learning a sport skill was specific to the training place). Participants were 30 adolescent female students (mean age 11.50±1.50 years) who performed 10 sessions of ...
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The aim of the present study was to examine the hypothesis of the specificity of practice regarding training place (to determine whether learning a sport skill was specific to the training place). Participants were 30 adolescent female students (mean age 11.50±1.50 years) who performed 10 sessions of learning perceptive-motor skill of Kata in Karate. After they finished Kata sessions, retention test was performed in the training place and transfer test in a different place and Kata scores were measured. To analyze the data, independent t test was used. Results showed that the subjects achieved their peak performance in the training place while their performance deteriorated significantly in the different place. It seems that the performance of the task was related to the place of training. The findings of this study provided evidence to support the specificity of practice hypothesis.
Maryam Nezakatalhosseini; Ahmadreza Movahedi; Hamid Salehi
Volume 3, Issue 1 , June 2011, , Pages 81-101
Abstract
The purpose of this study was to examine the effect of self-control feedback on relative and absolute timing through observational and physical practices. Participants (n=90) were randomly assigned to physical and observational practice (self-control, yoked, and instructor KR) groups. They practiced ...
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The purpose of this study was to examine the effect of self-control feedback on relative and absolute timing through observational and physical practices. Participants (n=90) were randomly assigned to physical and observational practice (self-control, yoked, and instructor KR) groups. They practiced a sequential timing task, which required participants to press four keys (2, 6, 8, and 4) respectively with regard to relative and absolute timing. Self-control group received KR about the model's performance whenever they requested it whereas the other groups (yoked, instructor) had no control on the feedback schedules. They performed 72 trials during the acquisition phase and 12 trials in retention and transfer phases. ANOVA with repeated measures and a multi-factorial ANOVA were conducted to analyze the collected data. The results demonstrated that during the acquisition phase, relative timing errors were lower in the self-control and instructor groups. During the retention and transfer phases, relative timing errors were lower for the self-control compared with the yoked and instructor groups. In addition, during the retention and transfer phase, absolute timing errors were lower for the yoked compared with the self-control group.
Fatemeh Pourshakouri Sharemi; Ahmadreza Movahedi; Ahmad Abedi
Volume 3, Issue 1 , June 2011, , Pages 147-164
Abstract
Socialization is one of the most important goals of any developmental program and educational scientists try to provide students with appropriate contexts to develop socialization throughout the developmental ages. This study aimed to investigate the effect of traditional and modern childish plays on ...
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Socialization is one of the most important goals of any developmental program and educational scientists try to provide students with appropriate contexts to develop socialization throughout the developmental ages. This study aimed to investigate the effect of traditional and modern childish plays on the social development of female students in the first grade (6-7 years old) in 1388-1389 in two elementary schools of regions 13 and 14 of Tehran city. The present research was performed experimentally with groups of modern plays, traditional plays and the control group along with the pretest and posttest. The subjects (N=45) were randomly divided into three groups. The first group played traditional plays for 15 weeks (once a week) and the second group played the modern plays for the same period of time, the third group which was considered as the control group did not carry out any kinds of playing. In order to measure social development of the students, Winelands (1953) social development questionnaire was used to measure social development. In this study, the statistical method of covariance analysis was used to analyze the data. The results showed that both traditional and modern childish plays had an effect on social development of children and there was no significant difference between these two plays, but the traditional plays gained more scores in social development. It can be suggested beneficial to have childish plays in syllabus at schools to improve children’s social development.
Ali Habibi; Ahmadreza Movahedi; Maryam Nezakat; Shahin Jalali; Jalil Moradi
Volume 2, Issue 2 , July 2010
Abstract
The purpose of this study was to study the matching of the competitiveness trait and kind of training condition when learning a sport skill (basketball free throw). 60 male university students (age 21.76±1.5 years) participated in this study and were divided into two homogeneous groups based on their ...
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The purpose of this study was to study the matching of the competitiveness trait and kind of training condition when learning a sport skill (basketball free throw). 60 male university students (age 21.76±1.5 years) participated in this study and were divided into two homogeneous groups based on their pretest scores. As a result, four training groups were used in this study. Sport Orientation questionnaire (reliability coefficient: 0.90) was used to determine the subjects’ competitiveness and non-competitiveness trait. The questionnaire was confirmed by Bahram. Groups performed the criterion task in a competitive and non-competitive condition for 10 sessions (15 trials each session). The basketball free throw test (EEHPERD) and Sport Orientation Questionnaire (SOQ) were used to gather the data. Posttest was performed after the final session and retention test 10 days after the posttest. To analyze the data, analysis of variance with repeated measures, ANOVA and post hoc tests were used at a=0.05. The results showed that competitiveness subjects performed better in the competitive condition and non-competitiveness subjects performed better in the non-competitive condition. The findings also showed a significant decrease in the retention test in the non-competitive condition group. The results of this study supported Zone of Optimal Function (ZOF) hypothesis and Interactionism approach.
Rasoul Hemayat talab; Ahmad Reza Movahedi
Volume 1, Issue 1 , July 2009, , Pages 27-41
Abstract
The Purpose of this study was to compare the effects of different combinations of mental and physical practices on the acquisition and retention of a motor skill in mentally retarded male students. Subjects were 40 guidance students who were healthy and novice in basketball penalty shot. They were selected ...
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The Purpose of this study was to compare the effects of different combinations of mental and physical practices on the acquisition and retention of a motor skill in mentally retarded male students. Subjects were 40 guidance students who were healthy and novice in basketball penalty shot. They were selected randomly and were assigned to 5 homogeneous groups (4 as experimental and 1 as control) based on their pretest scores, IQ and their ability in mental imagery. They exercised for 8 weeks, 3 sessions per week. Kolmogorov-Smirnov test, paired T test, one-way ANOVA and Tukey post hoc test were used to analyze the data. It was observed that all four variations of practice improved their performance, yet the mental practice followed by physical practice group outperformed the other groups. The results suggest that mental practice followed by physical practice results in an outstanding performance in mentally retarded adolescents.
Rasoul Suzande pour; Ahmad Reza Movahedi; Leila Mazaheri; Gholamreza Sharifi
Volume 1, Issue 1 , July 2009, , Pages 61-77
Abstract
The purpose of the present study was to compare the effects of two methods of self-modeling and video demonstration of an expert on the acquisition and retention of volleyball serve skill. Participants were 30 students (aged between 12 and 14) who were assigned into two homogeneous groups after the pretest. ...
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The purpose of the present study was to compare the effects of two methods of self-modeling and video demonstration of an expert on the acquisition and retention of volleyball serve skill. Participants were 30 students (aged between 12 and 14) who were assigned into two homogeneous groups after the pretest. The self-modeling group (n = 15) watched their performances in the criterion task via a video while the expert demonstration group (n = 15) observed the performance of an expert in the criterion task via a video. Both groups received the verbal cues and instructions. The two groups exercised the task for 4 weeks, 3 sessions per week. Immediately after the 12th session of exercise, a posttest, and 10 days later, a retention test was taken. Paired and independents t test were used to analyze the data. Results showed that both groups improved their performances significantly in acquisition and retention tests. No significant difference was found between the two groups in the acquisition of the skill but the expert demonstration group significantly improved their serve skill in the retention test. It seems that video demonstration of an expert improves students’ learning of volleyball serve skill.
