Fatemeh Keshvari; Alireza Farsi; Behrooz Abdoli
Abstract
Introduction: This study aimed to investigate alpha power in successful and unsuccessful free throws of elite and novice basketball players.Methods: The current research was quasi-experimental and was implemented in a time series design. Two Elite (10 participants with a mean age of 22.25 ± ...
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Introduction: This study aimed to investigate alpha power in successful and unsuccessful free throws of elite and novice basketball players.Methods: The current research was quasi-experimental and was implemented in a time series design. Two Elite (10 participants with a mean age of 22.25 ± 1.34) and Novice (10 participants with a mean age of 22.55 ± 1.80) groups participated voluntarily. The data were measured using 28 electrodes from a 32-channel wireless device and were analyzed using the repeated measures analysis of variance test (p≥0.05).Results: The alpha power of the elite group was higher than the novice group (P=0.001). The successful throws showed lower alpha power than unsuccessful throws (P=0.006). In the comparison of the two groups, the alpha power in the unsuccessful throws of the elite group was higher than in their successful throws (p=0.001), but no difference was observed between the alpha power of the successful and unsuccessful throws of the novice group (p=0.584). The alpha power during the execution time of the free throw task was higher than the pre-execution time (p<0.005), but there was no difference between the first and second pre-execution times (p=1.000). The results of the present study showed that the elite group had higher cortical activity than the novice group in all electrodes (p<0.001).Conclusion: The findings show that the elite group performed the task with less cortical complexity by inhibiting irrelevant information. In addition, the decrease in alpha power in successful throws indicates an increase in activation of cerebral cortex and an increase in concentration, so that the task can be performed with fewer neural resources.
Ebrahim Moteshareie; Behrouz Abdoli; Seyed Mohammad Kazem Vaez Mousavi; Alireza Farsi
Abstract
The aim of this study was to evaluate the effect of PST on performance, retention, and transfer under pressure of novice badminton players. 40 novice badminton players were randomly assigned to experimental (20 participants) and placebo-control (20 participants) groups. In acquisition and retention tests, ...
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The aim of this study was to evaluate the effect of PST on performance, retention, and transfer under pressure of novice badminton players. 40 novice badminton players were randomly assigned to experimental (20 participants) and placebo-control (20 participants) groups. In acquisition and retention tests, short and long service, toss clear and drop shots were used; in transfer under pressure test, notational analysis was applied. All participants acquired specific badminton skills in 24 sessions over three months. In addition to specific badminton skills, the experimental group received the specific package of PST during 24 sessions (each session 20 min.) while placebo-control group received the same number of sessions about general information on badminton. The results of mixed ANOVA indicated that in all tests, the scores of experimental group were significantly higher than those of the placebo-control group, which indicated the effectiveness of PST on performance and learning of novice male badminton players. The results of this study extended the effectiveness of PST to learning new motor skills.
Nasrin Parsaei; Behrooz Abdoli; Mohammadkazem Vaez Musavi; Mohammadali Aslankhani
Abstract
The aim of this study was to predict expert archers’ performance on the basis of
psychological factors such as arousal, activation, anxiety, motivation and
personality characteristics with an emphasis on extraversion / introversion
dimension. In this predictive correlation study, 34 expert archers ...
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The aim of this study was to predict expert archers’ performance on the basis of
psychological factors such as arousal, activation, anxiety, motivation and
personality characteristics with an emphasis on extraversion / introversion
dimension. In this predictive correlation study, 34 expert archers were randomly
selected as the sample of the study out of the archers of national team (statistical
population). Skin conductance level was measured to assess arousal. To determine
trait anxiety, Sport Competition Anxiety Test (SCAT) and for state anxiety,
Competitive State Anxiety Inventory (CSAI-2) were used. Sport Motivation Scale
(SMS) was used to determine motivation. Extraversion / introversion level was
measured by eysenck personality questionnaire. Pearson correlation coefficient
was used to determine the level of correlation and linear multivariate regression
was used to predict subjects’ performance. The results indicated a significant
positive relationship between subjects’ performance and arousal, activation,
motivation (intrinsic, extrinsic) and extraversion / introversion whereas there was
no significant relationship between their performance and anxiety (trait, cognitive,
somatic) and consequently they could not predict performance. Also, the results
revealed that arousal and activation (P
Alireza Farsi; Behrooz Abdoli; Narges Fa’al; Maryam Kavyiani
Volume 3, Issue 2 , October 2012, , Pages 29-43
Abstract
The aim of this study was to compare gross motor skills development in two subtests (locomotors and object control) in preschool children in the deprived and rich environments. Participants in this study were 39 children (mean age: 5 yr). 19 children were selected from deprived environments without extensive ...
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The aim of this study was to compare gross motor skills development in two subtests (locomotors and object control) in preschool children in the deprived and rich environments. Participants in this study were 39 children (mean age: 5 yr). 19 children were selected from deprived environments without extensive motor experiences, and 20 children from a preschool with extensive motor experiences. Ulrich (2000) gross motor development test was used to collect data. Data were analyzed by independent t test. Results showed that there was a significant difference between two groups of rich and deprived in percentage score of locomotors (P=0.001), percentage score of object control (P=0.004), motor development quotient scores (P=0.001). The findings also showed that children with varied motor experiences and education compared with deprived children had higher qualified function in gross motor skills.
Alireza Farsi; Behrooz Abdoli; Maryam Kaviyani
Volume 3, Issue 1 , June 2011, , Pages 43-55
Abstract
The aim of this study was to compare the effects of cognitive-attentional and cognitive-motor load on the performance of bimanual coordination skill. 31 female students (mean age 25+2 years) from Shahid Beheshti University attending were selected voluntarily and divided randomly into three groups: single ...
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The aim of this study was to compare the effects of cognitive-attentional and cognitive-motor load on the performance of bimanual coordination skill. 31 female students (mean age 25+2 years) from Shahid Beheshti University attending were selected voluntarily and divided randomly into three groups: single group (N=11), cognitive group (N=10) and cognitive-motor group (N=10). Single group participants performed bimanual coordination single task. Cognitive group participants performed bimanual coordination task simultaneously with number countdown task, and cognitive – motor participants performed bimanual coordination task simultaneously with feet reaction time task. Two hand coordination of Vienna test system was used to assess the performance of bimanual coordination task. One – way ANOVA and Tukey post hoc test were used to analyze data. Statistical significance level was p
Mehran Shahintab; Mohammad ali Aslankhani; Behroz Abdoli; Kombiz Kamkari
Volume 2, Issue 2 , July 2010
Abstract
The main of this research was to investigate the effect of a psychological training program on mental health of elite basketball players. This research was semi–experimental with pretest posttest and a control group. The population consisted of all basketball players from Iran basketball super league ...
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The main of this research was to investigate the effect of a psychological training program on mental health of elite basketball players. This research was semi–experimental with pretest posttest and a control group. The population consisted of all basketball players from Iran basketball super league (N=150). They were divided into two teams: experimental and control group. Minnesota multiphasic personality inventory – 2 restructured form (MMPI – 2RF) was used to collect data which consisted of validity scales profile as well as 4 profiles including clinical, somatic/cognitive and internalizing scale, externalizing scale, interpersonal and interest scale and psyche scale. This inventory consisted of 338 questions and showed high validity and reliability coefficients (P
Alireza Farsi; Behroz Abdoli; Maryam Kaviani; Akram Kaviani
Volume 2, Issue 2 , July 2010
Abstract
The purpose of this study was to investigate the effect of perceptual – motor experience on motor development quotient of fine and gross motor skills in infants. Fifteen 5-8-month-old healthy infants participated randomly in this study and were divided homogenously into two groups (experimental and ...
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The purpose of this study was to investigate the effect of perceptual – motor experience on motor development quotient of fine and gross motor skills in infants. Fifteen 5-8-month-old healthy infants participated randomly in this study and were divided homogenously into two groups (experimental and control) according to their age. Experimental group had 36 training sessions, each session an hour at a perceptual – motor enriched environment. Peabody motor development scale was used to evaluate fine and gross motor skills. Data were analyzed by independent t test. Results indicated a significant difference in mean score of motor development quotient between fine motor skills (p=0.004) and gross motor skills (p=0.02). These findings showed that training and experience had a positive effect on motor development generally and on motor development quotient of fine and gross motor skills specifically. In other words, training and experience were positive factors of fundamental and basic motor skills development of the infants in both groups. These results are in line with the perspective of dynamic systems of motor development.
Roza Rahavi; Mohammad ali Aslankhani; Behrooz Abdoli; AbdulWahab Vahabzade
Volume 1, Issue 2 , October 2009, , Pages 65-85
Abstract
The aim of the present study was to investigate the effects of various scheduled practices (self-regulated and non-self-regulated) on the acquisition, retention and transfer of simple and complex tracking tasks. 96 right-handed undergraduate students (age rang: 18-24 years old) volunteered to participate ...
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The aim of the present study was to investigate the effects of various scheduled practices (self-regulated and non-self-regulated) on the acquisition, retention and transfer of simple and complex tracking tasks. 96 right-handed undergraduate students (age rang: 18-24 years old) volunteered to participate in this study (48 females, 48 males). These students participated in physical education classes (1 & 2) in their first semester of 1387-88. Participants were assigned to one of eight different groups (n=12), which differed in types of tasks performed (simple tracking or complex tracking) and the practice schedule used (blocked, random, self-regulated, or yoked). The method was quasi-experimental. These tasks were designed as software and appeared on a computer monitor. The movement time and movement error (click) were assigned as scores in different groups. After the pretest, the subjects practiced 8 16-trial blocks in 2 sessions. 24 hours later, they participated in the retention and transfer tests. The data were analyzed by mixed factorial ANOVA and Bonferroni post hoc test. The results showed a significant difference between various scheduled practices and type of task in various stages of movement time (P
