Sepehr Ferdousi; Mahdi Shahbazi; Elahe Arabameri
Abstract
Introduction: The purpose of present study was to test the effect of contextual interference and self-regulation on the transfer of volleyball services (underhand and windmill service).Methods: Participants were 39 male students (20-25 years old) were randomly assigned to one of three groups (blocked, ...
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Introduction: The purpose of present study was to test the effect of contextual interference and self-regulation on the transfer of volleyball services (underhand and windmill service).Methods: Participants were 39 male students (20-25 years old) were randomly assigned to one of three groups (blocked, random and self-regulation) and performed total of 40 trials of volleyball service each session (6 sessions). The blocked group practiced 40 trials of one service each session but the random group randomly practiced both services. In self-regulated group, the type of services in each session was determined by subjects. The transfer test was conducted one week after practice period in 5 trials. In order to analyze the data, the one-way analysis of variance and the Tukey’s post hoc tests were used.Results: The comparison between the pre-test and transfer test showed that the difference between blocked and random groups was not statically significant. The self-regulation group had higher transfer scores compared to blocked and random groups.Conclusion: The results of present work support the contexuual interference affect but it’s not significant. Self-regulated practices involve the subjects in learning processes. Also, with his method, they participate more activity in determining the characteristics of the exercise. These factors lead to the improvement of learning and better performance.
Saeed Nazari; Rasool Hemayattalab; Mahmood Sheikh; Morteza Homayounnia
Abstract
This study aimed at investigating the effect of blocked, incremental systematic and random contextual interferences on acquisition, retention and transfer of volleyball skills based on changes in a generalized motor program. In fact, this study was conducted to answer this question that whether regular ...
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This study aimed at investigating the effect of blocked, incremental systematic and random contextual interferences on acquisition, retention and transfer of volleyball skills based on changes in a generalized motor program. In fact, this study was conducted to answer this question that whether regular increment of contextual interference level is more effective on learning volleyball service skill than blocked or random practice schedules. 30 students (mean age 23±4 yr, 3 groups and each 10 subjects) participated in this study. The groups were different in practices of the three services. Subjects performed simple, overhead and single arm skills from a distance (9 m from the volleyball net) with different practices. Each participant practiced 108 trials of each service, totally 324 trials during 9 sessions (each session 36 trials). The results indicated that incremental practice resulted in a better performance in retention and transfer tests than blocked and random practices (P˂0.05). In general, it was suggested that the practice should be scheduled so that it can start from low interference and gradually and systematically continues towards high interference in order to facilitate learning of several generalized motor skills.
Mohammad Taghi Aghdasi; Sima Abdolzadeh
Abstract
The present study aimed at determining the relationship between learning styles and the effect of random and blocked practices on learning of badminton serve skills. In this quasi-experimental study, 48 female high school students were randomly placed in four groups: 1. convergent learning style ...
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The present study aimed at determining the relationship between learning styles and the effect of random and blocked practices on learning of badminton serve skills. In this quasi-experimental study, 48 female high school students were randomly placed in four groups: 1. convergent learning style with random practice, 2. convergent learning style with blocked practice, 3. divergent learning style with random practice and 4. divergent learning style with blocked practice. After the pretest, subjects went through the acquisition phase under specific conditions of each group and then participated in retention and transfer tests. Kolb Learning Styles Questionnaire (KLSI) and French short serve test and Scott and Fox high serve tests were used. ANOVA was used to compare the scores of the four groups. Findings showed differences among immediate retention, delayed retention and learning transfer (P<0.05). Convergent learning style and random practice were more effective than divergent learning style and blocked practice to learn badminton serve skill (P<0.01). Therefore, focusing on the role of learning styles and learning intervention in instructing serve skills gains importance.
Aioob Sabaghi; Naser Behpoor; Ali Heirani
Abstract
This study aimed at investigating the effect of the type of feedback and practice on the acquisition of parameter index. For this purpose, 8 groups (each 12 subjects) were formed: constant practice group with self–controlled feedback, constant practice group with yoked feedback (yoked group), blocked ...
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This study aimed at investigating the effect of the type of feedback and practice on the acquisition of parameter index. For this purpose, 8 groups (each 12 subjects) were formed: constant practice group with self–controlled feedback, constant practice group with yoked feedback (yoked group), blocked practice group with self–controlled feedback, blocked practice group with yoked feedback, random practice group with self–controlled feedback, random practice group with yoked feedback, serial practice group with self–controlled feedback and serial practice group with yoked feedback. The subjects threw towards a circle drawn on the ground with closed eyes from a 3m distance with the score range from 10 to 100 (failing to throw in the circle meant no score). The data were analyzed using mixed factorial analysis of variance and one-way analysis of variance (P<0.05). In the retention test, the self–controlled feedback prioritized the yoked feedback (P<0.05); however, the effect of practice type was not observed (P>0.05), that is, there was no difference between practice in contextual interference condition and practice in constant condition. The results observed in the transfer test were contrary to those observed in retention test, that is, the effect of feedback type was not observed (P>0.05). The results also showed that the children did not reach the final stage of self-regulation (i.e. generalization) while the effect of practice type was observed (P<0.05) and the practice groups in contextual interference condition were superior. Also, there was no statistically significant difference among practice groups in contextual interference condition (i.e. blocked, serial and random practice groups) in all acquisition stages. Overall, this study showed the beneficial effect of self–controlled feedback in the retention test and practice in contextual interference condition in the transfer test in children. As there was no difference among practice groups in contextual interference condition, the present results confirmed Magill and Hall's (1990) second hypothesis, because the effect of contextual interference was not observed in a similar motor program.
Alireza Farsi; Behrooz Abdoli; Mohammadreza Gasemian
Abstract
The aim of this study was to compare the effects of random and blocked practices with respect to the changes in generalized motor program (GMP) and parameter on acquisition, retention and transfer of table tennis service. For this purpose, 32 subjects were randomly assigned to four groups (8 ...
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The aim of this study was to compare the effects of random and blocked practices with respect to the changes in generalized motor program (GMP) and parameter on acquisition, retention and transfer of table tennis service. For this purpose, 32 subjects were randomly assigned to four groups (8 subjects each group). In the first two groups, GMP changed with blocked and random arrangements while in the last two groups, parameter changed with those arrangements. After pretest, participants completed 300 trials in each task (totally 900 trials) and then they participated in posttest, retention and two transfer tests with different aims. The data were analyzed by two-way ANOVA and ANOVA with repeated measures (P˂0.05) and Bonferroni post hoc test was used to mark the differences of the groups. The findings showed that despite the type of changes, the random practice caused better performance than blocked practice and these advantages of random practice in GMP changes were greater. However, these effects not only were observed in the same situation but also were maintained in other contexts. In addition, these effects not only influenced performance but also caused the participants to perform the tasks with more efficiency, more cognitive effort and less attention.