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Showing 5 results for Khalaji

Nastaran Parvizi, Masoomeh Shojaei, Hasan Khalaji, Afkham Daneshfar,
Volume 1, Issue 1 (9-2011)

The purpose of present study was investigation of the effect of attention direction variation by instructional self-talk on performance and learning of Basketball free throw. Therefore, 33 novice female students (mean of the age=22 yr.) who had intermediate trait anxiety were selected randomly. The participants were assigned to 3 matched groups according to pretest. The self-talk with internal and external focus groups repeated the words “wrist” and “center of ring”, respectively, before each free throw during 6 sessions (2 blocks of 10 trials in each session). Control group performed the free throws without self-talk. Retention test was performed 48 hours after the acquisition phase and transfer test was done after that with spectators. In each test, throw accuracy was measured by a 5-point scale. Results of mix 2-factor and one-way ANOVA did not indicate significant differences between acquisition, retention, and transfer groups (p>.05), but the within subjects effect of external focus of attention on transfer was significant (p<.05). Therefore, it seems use of self-talk and its attentional focus variation is not necessary for novice Basketball players.
Mehdi Roozbahani, Seyyed Mohammad Kazem Vaez Mosavi, Hasan Khalaji,
Volume 2, Issue 4 (12-2012)

The purpose of this study was to explore the effectiveness of the number of practice trials in determining the degree of task complexity. Sixty subjects according to the types of tasks (A-B) and receiving feedback (100%, omitted, self-control) were randomly divided into six groups.All of the subjects practiced 100 trials tasks in each day on first two days. Retention tests were performed during the second and third day and reacquisition tests were performed on the third day. Using ANOVA with repeated measures showed found that,all of the subjects improved across practice trials on both days but this improvement in B task was significantly better than A task on the second day. Subjects were significantly better in the second retention and reacquisition tests compare with first one’s, in addition subjects that practiced B task were better than those that practiced A task in the second retention test (p<0.05). Results indicate that A task was more complex than B task, and the optimal practice trials is required to understanding which task is complex.
Mr Mohamad Moradi, Dr Hasan Khalaji, Dr Alireza Bahrami,
Volume 6, Issue 11 (9-2016)

The purpose of the present study was to determine the relationship between sport success and kinesthesia in male athlete college students. The methods used in the study was descriptive correlation. 100 students athletic in different fields from students’ of state university of Arak in 2012-2013 with the mean age of 21/80±1/94 purposefully using random multistage sampling were selected. (34 students in volleyball, 33 students in badminton, 33 students in wrestling). To collect data, with Personal information questionnaire, Ego orientation in sport questionnaire (Duda & Nichols, 1989), Zhecoofski dominant-hand's angle accommodation tests (1988) and Ablacova force control dominant-hand's (1990) were used. Data was analyzed by person's correlation test, multilevel regression analysis and the Analysis of variances. Shown in findings, volleyball players got a better score than other athletes in terms of sport success and kinesthesia. Also analysis of variances showed a significant relationship between sport success and kinesthesia. According to the results, sports of which kinesthesia of the dominant hand was their main reason of success had better kinesthesia and athletic success.

Zeinab Khodaverdi, Dr Abbas Bahram, Dr Hassan Khalaji, Dr Anoshirvan Kazemnejad, Dr Farhad Ghadiri,
Volume 12, Issue 23 (9-2022)

This study aimed to address agreement level of performances on 3 selected motor skill assessment tools in a sample of Iranian first to fourth graders aged 7-10 year olds. The convenience sample included 164 healthy girls from public schools.  A Pearson correlation coefficient was calculated on the association between MABC-2, KTK and TGMD-3 performances in graders. A one-way multivariate analysis of variance (MANOVA) was conducted to compare performances means across grade levels. Low-to-moderate correlations were found between assessments across age in each assessment. In general, girls demonstrated higher scores across age cohorts. In conclusion, low-to-moderate associations among assessments instruments provide different pictures/levels of motor competency and should not be used interchangeably in studies. 

Mrs Maryam Khalaji, Dr Mahin Aghdaei, Dr Alireza Farsi, Dr Alessandro Piras,
Volume 100, Issue 100 (10-2020)

Using auditory concurrent feedback with the goal of gaze path learning is one of the novelty methods in the attention field. The present study aimed to determine the effect of bisensory feedback using eye movement sonification on the decision-making of the badminton clear shot direction. In a Semi experimental strategy, with pre-post design without a control group and clinical method, participants performed recognizing the direction of the shot under unisensory and bisensory training conditions. Response accuracy, response time, and fixation duration were measured in the pre-test, immediate retention, and delayed retention. The results showed that in the immediate and delayed retention, the bisensory group had higher response accuracy and shorter response time than the unisensory group. The bisensory group had a longer fixation duration in key areas than the unisensory group in both times. The use of auditory feedback can probably be considered as a way to improve decision-making skills at the novice level.

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