Mehrzad Kharestani; Mojtaba Esmaeeli Abdar; Ahmad Ghotbi Varzaneh
Abstract
The aim of the present study was to examine the effect of different types of imagery on the skills performance of 7-10-year-old soccer players. 45 children (mean age 8.44±1.13 year) with similar imagery abilitywere selected and randomly assigned to three groups (each group 15 subjects). The training ...
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The aim of the present study was to examine the effect of different types of imagery on the skills performance of 7-10-year-old soccer players. 45 children (mean age 8.44±1.13 year) with similar imagery abilitywere selected and randomly assigned to three groups (each group 15 subjects). The training protocol was performed three sessions a week for 6 weeks. Data analysis indicated a significant difference between the groups in acquisition (P=0.001) and retention (P=0.002) phases. The results of Tukey post hoc test in the acquisition phase indicated no significant differences between cognitive specific imagery group and cognitive general imagery group (P=0.53) but there were significant differences between cognitive specific imagery group and traditional imagery group (P=0.006) and also between cognitive general imagery group and traditional imagery group (P=0.03). Also, in the retention phase, the results of Tukey post hoc test indicated significant differences between cognitive specific mental imagery group and traditional mental imagery group (P=0.002), between cognitive specific mental imagery group and cognitive general mental imagery group (P=0.037) and between cognitive general imagery group and traditional imagery group (P=0.001). With regard to the findings, the role of the cognitive specific imagery was in the center of attention more than before and soccer instructors and coaches are recommended to use this type of imagery.
Ahmad Ghotbi-Varzaneh; Mehdi Zarghami; Alireza Bahrami
Abstract
The aim of the present study was to examine the reliability and validity ofbalance performance clinical tests for hearing impaired persons with moderatehearing level. In this descriptive-survey study with repeated measures, 220 hearingimpaired subjects with normal intelligence and moderate hearing level ...
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The aim of the present study was to examine the reliability and validity ofbalance performance clinical tests for hearing impaired persons with moderatehearing level. In this descriptive-survey study with repeated measures, 220 hearingimpaired subjects with normal intelligence and moderate hearing level wereselected as the statistical sample from all deaf and hearing impaired subjects whohad participated in national competitions in Arak city. The scale (3) of CattellCulture Fair Intelligence Test and motor performance clinical tests were used tocollect the data. After checking the date normality, data were analyzed with intraclassand interclass correlation coefficients and factor analysis tests. The resultsrevealed that finger-to-noise test with dominant hand (ICC=0.79), and with nondominanthand (ICC=0.81), time-up and go test (ICC=0.76), and tandem gait test(ICC=0.87) were reliable. But, the dominant and non-dominant single leg stancetests with open and closed eyes were not reliable (ICC<0.75). The validity ofbalance performance clinical tests was confirmed with factor analysis test. Overall,the finger-to-noise with dominant and non-dominant hand, the time-up and go, andthe tandem gait tests were the most stable tests to assess balance and coordinationof hearing impaired participants.
Samaneh Imanipour; Parvaneh Shafienia; Seyed Esmayil Hashemi Sheikh Shabani; Ahmad Ghotbi Varzaneh
Abstract
The postural control system is a complex motor system which is formed basedon an interaction of different dynamic processes and many laboratory techniquesrecognize performance disorders using a wide range of neurological signs andsymptoms. The present research aimed to assess the reliability of commonly ...
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The postural control system is a complex motor system which is formed basedon an interaction of different dynamic processes and many laboratory techniquesrecognize performance disorders using a wide range of neurological signs andsymptoms. The present research aimed to assess the reliability of commonly usedclinical measures of balance and to investigate the effect of age, height, weight andBMI on performing clinical balance tests. For this purpose, 133 participants (agerange 18-59 yr) who had at least 3 sessions of sport activity per week, participatedin this research. Clinical balance tests included finger-to-nose (FTN), single legstance (SLS), tandem stance and time-up-and-go (TUG). The results showed thatthe first performance of each three trials was slower. The relationship betweensome factors and these balance tests were examined. The results revealed that FTNand TUG especially TUG test were the most stable measure to assess sportsrelated concussion
Javad Parhizkar Kohneh Oghaz; Mehdi Zarghami; Ahmad Ghotbi Varzaneh; Amirhosein Ghorbani
Abstract
Postural control has an important role in daily activities and motor independence. In recent years, conscious aspects of postural control such as attention and cognitive processes have received attention for balance optimization performance. Therefore, the present study designed to examine the age–related ...
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Postural control has an important role in daily activities and motor independence. In recent years, conscious aspects of postural control such as attention and cognitive processes have received attention for balance optimization performance. Therefore, the present study designed to examine the age–related differences in postural control in the internal and external focus of attention. For this purpose, displacement of the anterior–posterior, middle–lateral and speed of center of pressure (cop), 22 elderly subjects (mean+SD=59.95±2.12 year) and 22 young men (mean+SD=24.16±2.76 year) who were selected from Shahid Chamran University students and staff purposefully and by availability were measured in three 30–second trials in the internal focus and three 30-second trials in external focus using force platform. After the normality of data had been tested with Kolmogorov-Smirnov test and the equality of variance had been tested using the Levene test, data were analyzed using multivariable variance analysis, one–way variance analysis and MANOVA. Results showed that postural stability of both groups in external focus was more than internal focus. These results supported limited action hypotheses and conscious processes. Also, in both conditions, young group had more postural stability than the elderly. It seems that the weaker performance of the elderly in both external and internal conditions was due to the effects of aging on sensorimotor systems.
Ahmad Ghotbi-Varzaneh; Mehdi Zarghami; Esmaiel Saemi; Farzad Maleki
Abstract
The present study aimed to examine throwing accuracy and spatial and digit
working memory of field dependent-independent participants. The group embedded
figure test (GEFT) was distributed among 320 male students and based on the
GEFT scores, 45 participants were randomly divided into field dependent, ...
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The present study aimed to examine throwing accuracy and spatial and digit
working memory of field dependent-independent participants. The group embedded
figure test (GEFT) was distributed among 320 male students and based on the
GEFT scores, 45 participants were randomly divided into field dependent, field
independent and control group (15 participants/each group). The study included
two tasks (dart throwing and spatial and digit working memory). In dart throwing
task, participants threw 10 darts in pre-test stage. In acquisition stage, participants
threw 60 darts in 6 blocks of 10 trials. The retention test included a block of 10
trials which was performed 24 hours after the acquisition stage. The spatial and
digit working memory test was performed individually with Cambridge brain
science software. Data were analyzed with 2-way analysis of variance with
repeated measures, one-way ANOVA test, Tukey post hoc test and Pearson
correlation coefficient. The results indicated that field independent participants
performed better in both tests of dart throwing and working memory than field
dependent participants. The findings indicated that higher scores of the GEFT task
demonstrated higher visuospatial ability (as a component of working memory) in
field independent participants which may cause a better performance in spatial
and digit working memory and dart throwing task.
Ahmad Varzaveh; Mehdi Zarghami; Esmaeil Saemi; Hosein Molania
Volume 2, Issue 1 , April 2010, , Pages 115-131
Abstract
The main purpose of this study was to examine the effect of metamotivational states on self-efficacy perceptions and motor performance in dart throwing beginners in easy and difficult conditions. For this purpose, the paratelic dominance questionnaire (Cook & Gerkovich, 1993) was distributed among 140 ...
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The main purpose of this study was to examine the effect of metamotivational states on self-efficacy perceptions and motor performance in dart throwing beginners in easy and difficult conditions. For this purpose, the paratelic dominance questionnaire (Cook & Gerkovich, 1993) was distributed among 140 male students, and 32 participants were randomly divided into two groups (16 in a telic group and 16 in a paratelic group). Each task consisted of three blocks of eight trials, and each trail consisted of 4 throws. Participants completed the Self-Efficacy Scale (Feltz & Chase, 1998) in their pretest and after trials 8, 16, 24. Data were analyzed with repeated measure, ANCOVA test and LSD post hoc test. The results showed a significant difference between paratelic and telic participants in self-efficacy perception (difficult task), and no significant difference in motor performance. Overall, the study only partially confirmed the reversal theory.