ahmad Ghotbi Varzaneh; hamed fahimi; Khajavi Daryoush
Abstract
Introduction:Children with developmental coordination disorder exhibit weaknesses in performing and tracking aiming-catching tasks. The present study aimed to investigate the effect of visual occlusion on aiming-catching skills and quiet eye duration in children with developmental coordination disorder. Methods: ...
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Introduction:Children with developmental coordination disorder exhibit weaknesses in performing and tracking aiming-catching tasks. The present study aimed to investigate the effect of visual occlusion on aiming-catching skills and quiet eye duration in children with developmental coordination disorder. Methods: In this semi-experimental study, which was conducted with a repeated measurement design, 26 children with developmental coordination disorder with an age range of 7 to 9 years were selected from among the girls and boys with developmental coordination disorder in Khorasgan Welfare and Rehabilitation Center of Isfahan. The participants threw 10 balls towards the wall and simultaneously catching the return ball under three conditions of full vision, initial occlusion, and late occlusion. At the same time as throwing and receiving the ball, the eye movements of the participants were recorded by a eye tracking device, as well as their performance score. The data were analyzed by within group analysis of variance with repeated measurements and Bonferroni post hoc test.Results: The results showed that the performance of aiming-catching skills and the length of the quiet eye period in the conditions of initial occlusion and late occlusion were significantly weakened compared to the conditions without occlusion (p<0.05). Also, the results showed that initial occlusion caused further weakening of aiming and catching skills as well as a shorter period of quiet eye compared to late occlusion (P<0.05).Conclusion: In general, the results of the present research support the role of the pre-programming system in the implementation of aiming and catching skills in children with developmental coordination disorders.
Hamed Fahimi; Hassan Gharayagh zandi; Fazlallah Bagherzadeh; Ali Moghadamzadeh; Davood Homanian SharifAbadi
Abstract
.Introduction: The present study aimed to investigate the effect of strategic self-talk on volleyball players' performance and visual attention.Methods: This quasi-experimental research employed a pre-test/post-test design with a control group. Participants included 54 novice male volleyball ...
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.Introduction: The present study aimed to investigate the effect of strategic self-talk on volleyball players' performance and visual attention.Methods: This quasi-experimental research employed a pre-test/post-test design with a control group. Participants included 54 novice male volleyball players selected via convenience sampling. They were randomly assigned into five groups: instructional self-talk (n=10), motivational self-talk (n=11), instructional-motivational self-talk (n=10), motivational-instructional self-talk (n=11), and control (n=12). The self-talk intervention was conducted over 12 weeks, with three sessions per week. In both the pre-test and post-test phases, serving scores were recorded by the researcher, and participants' gaze behavior was measured using an eye tracker while performing a simple volleyball serve task. Data were analyzed using the Analysis of Covariance (ANCOVA) and Bonferroni post-hoc tests.Results: The findings revealed that strategic self-talk had a significant effect on simple serve performance (P=0.0001) and quiet eye duration (P=0.0001). Bonferroni post-hoc tests indicated that instructional self-talk improved motor performance and increased quiet eye duration. Combined self-talk groups (instructional-motivational and motivational-instructional) also exhibited enhanced motor performance and prolonged quiet eye duration. However, motivational self-talk alone had no significant effect on motor performance and quiet eye duration.Conclusion: The results underscore the importance of instructional self-talk in enhancing performance and visual attention in novice volleyball players, supporting the attentional mechanisms underlying self-talk.
Hamed Fahimi; Elahe Arabameri; Rasool Hemayat Talab
Abstract
The aim of this study was to compare quiet eye in children with high and low motor proficiency. In this causal-comparative study, 40 children (7 to 14 years old) in Isfahan city were selected by multiple cluster sampling method. Participants performed throwing and catching task in 10 trials. The data ...
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The aim of this study was to compare quiet eye in children with high and low motor proficiency. In this causal-comparative study, 40 children (7 to 14 years old) in Isfahan city were selected by multiple cluster sampling method. Participants performed throwing and catching task in 10 trials. The data of quiet eyes were recorded by an eye tracking device (Ergoneers) and analyzed by Dikablis 3.1 software when performing the desired task. After the evaluation of data normality, the data were analyzed by independent t test and Pearson correlation coefficient at the significance level of 0.05. Independent t test results showed that children with high motor proficiency were better in the onset of QE (P=0.0001), offset of QE (P=0.023), QE duration (P=0.0001) and catching performance (P=0.0001) than children with lower motor proficiency. Also, the results showed a significant negative relationship between the catching performance and the onset of QE and a significant positive relationship between the catching performance and the offset of QE and QE duration in both groups of children with high and low motor proficiency. The results of the study generally revealed that the QE is considered as an effective variables associated with motor performance and appropriate to expertise level.
