Showing 9 results for taheri
Ali Abbas Zadeh, Hamid Reza Taheri, Ali Heirani, Bahram Yousefi,
Volume 2, Issue 3 (8-2012)
Abstract
The aim of this study was examining the effect of knowledge of results presentation (after successful and unsuccessful trials), on learning and error detection capability in force-produce task. Sixty under graduated students (range age 21.6±4), participated in this study and in order to KR presentation, divided in three groups. One of the groups received KR after successful trials, the other groups after unsuccessful trials. The control groups did not receive any KR. All the participants throughout the trials in the acquisition and retention phases were error estimated. The task was to produce the 70℅ of maximum force of their right hands, by gripping a dynamometer. After data collection, the analysis conducted by using ANOVA repeated measurements for acquisition period, and one way ANOVA for retention test. In acquisition, results showed no significant differences between the first and second groups, on performance and error detection capability of force-produce task (P> 0.05). However in retention (no KR), there was significant differences between two groups (P&le0.05), means that the first group which received KR after successful trials was better than the second group as well as control. This pattern of results suggests that if people receive the KR after successful trials than unsuccessful, the better learning and error detection capability will occur.
Mr Mehdi Nabavi Nik, Dr Abbas Bahram, Dr Hamid Reza Taheri, Mrs Mahnaz Zolghadr,
Volume 6, Issue 11 (9-2016)
Abstract
Visual context is the context that exists in front of eye field which changes as player moves anyway and forms the new visual context. The favorite locations are the zone that players practice many times over the practice time. The players performs the best own performance from that. The aim of this study was to evaluate the visual context as one of the reasons making the especial skills in favorite location of experienced players. 8 elite basketball players were men with at least 8 years of experience of basketball. They were asked to throw 210 jump shots from 7 different locations in the 3 set and 21 blocks. The middle location is the favorite one. The throws are performed with the players' own pace and there is 2 minute rest between sets. All throws return to players with the same way. Separate linear regression for each of the players has been calculated at seven different angles. Then, these data are separately used to calculate the predicted values in the favorite location of each player. The actual performance of the players at different angles was compared with the predicted values by independent t test. The results showed that there was significant difference between the predicted and actual performance of the players in the favorite angles (p<0.05). The findings show that the performance of the elite players in their favorite spots is dependent on the angle of vision especially at favorite locations. It seems that elite players over the years to practices at the certain point acquire some visual benefits that led to the specific performance in their favorite locations
Dr Hamid Reza Taheri, Mr Mohamad Reza Ghasemian Moghadam, Mr Davood Fazeli,
Volume 6, Issue 12 (11-2016)
Abstract
The purpose of this study was to examine the effect of skill level on variability of
intra limb coordination and control variables in top spin strike. The 16 participants
of this study were divided into two groups of Skilled and Novice. The Skilled group
was consisted of players who ranked as 8 top in national ranking at their age stage
and the Novice group was consisted of players who recently learned the top spin
skill. They performed 10 top spin strikes with emphasis on speed and accuracy.
Movement kinematics were recorded and analyzed. There was a difference
between these two groups in variability of intra limb coordination (p<0.05) and the
Skilled group performed more consistent. However, there was not any differences
between these two groups in movement control variables (all p>0.05). This study
showed that the skilled performers have more consistency in their movement
patterns, while it could be no difference with novice performers in control variables
as cause of task constraints.
Mrs Maryam Taheri Kia, Mrs Atefeh Asad Zadeh, Dr Alireza Elahi,
Volume 8, Issue 15 (8-2018)
Abstract
The participation of spectators– including both men and women- in sport stadiums and their profitability is one of the new experiences in the world of sports . A significant proportion of Persepolis and Esteghlal fans are women; so, providing conditions for women's loyalty to these teams can help in some decisions on fans management.One of the reasons for loyalty of fans may be the team's quality. In this study, attitudinal and behavioral loyalty of Persepolis and Esteghlal fans was predicted by quality of teams. For this purpose, 395 cases were randomly selected from female students who were the fans of Esteghlal and Persepolis teams from 20 universities in Tehran using Morgan table. They completed Zhang's quality of team questionnaire (1997) and Mahoney’s fans psychological commitment questionnaire (2000). The results indicated significant and direct relationship between team’s quality and fans attitudinal loyalty (r = 0.449, p <0.01). Also, quality of team explained about 20% of change in fans’ attitudinal loyalty ( According to results, attitudinal loyal of fans was impressed by the quality of team. Then, employing famous players and coaches, providing attractive games, and things like that, female fans may be more loyal.
Mrs Adeleh Zehtab Najafi, Dr Seyed Mohamad Kazem Vaez Mousavi, Dr Hamid Reza Taheri,
Volume 8, Issue 15 (8-2018)
Abstract
The aim of this study was to investigate the effect of selected psychological interventions on reducing the competitive State anxiety of athletes of Kermanshah .Current study was semi- experimental with pre-test and post-test and random replacement.90 people were selected by accessible sampling in two experimental and control groups. The educational package was performed through 12 ninety-minutes sessions on the experimental group. Information collecting tool was Competitive State Anxiety Inventory. statistical analysis was descriptive statistics and analysis of mancova whit using SPSS 22 program.Covariance showed that psychological interventions has reduced competitive State anxiety of experimental group athletes(p<0/000,cognitive state anxiety f=195/353 ,p<0/000,somatic state anxiety f=31/940 ,p<0/000,self steem f=128/740). In all, performance of psychological interventions is effective on reducing competitive state anxiety in athletes.
Dr Masoud Taherinia, Dr Ali Shariatnejad, Dr Akbar Khodabakhshi,
Volume 10, Issue 20 (11-2020)
Abstract
This paper was conducted with aim of analyze sport club manager’s compensation strategies based on their life cycle. This research is a mixed research with qualitative and quantitative approach. In the qualitative section data were gathered with semi-structured interview and in the quantitative section data were gathered with expert questionnaire. The statistical population is the sports clubs, and the sample members are selected from senior managers, public relations managers and media managers of these clubs. According to the purpose of the study, the sampling in this study is purposive and with regardeng to the principle of theoretical adequacy, the sample size was estimate. The research data were analyzed in qualitative section using Atlas.ti and in quantitative section data were analyzed by Delphi fuzzy method. The results indicate that Clubs that are in the start-up level, should use the combination of compensation for executives in the form of ownership rights, equity ownership plans and ownership shares. In addition, the results show that Clubs that are in the growth level, able to compensate their managers with using merit-based salaries, output-based remuneration, and success-based pay.
Dr Maryam Taherikia, Dr Alireza Elahi, Dr Hossein Akbari Yazdi,
Volume 12, Issue 23 (9-2022)
Abstract
In recent decades, sports organizations have paid special attention to the importance of considering the purchase behavior of customers. Meanwhile, the variables that can have an impact on customers' purchase behavior have been considered. This study aimed to determine the causal relationship between relationship marketing and purchase behavior of spectators using structural equation modeling. For this purpose, two questionnaires including Kim’s relationship marketing and purchase behavior questionnaires (2008) were used. After confirming their validity and reliability, these questionnaires were distributed among the sample. Sample was consisted of 430 spectators who participated in Foolade_Shahr Stadium to watch the Sepahan’ games using Morgan table. The research method was statistical -correlational and it was based on the structural equation model. The results of path analysis showed that relationship marketing has an impact on purchase behavior of spectators (β= 0.043, p≤0.05). Considering the findings of this study, approaches can be provided to determine the strategy of relationship marketing and evaluate the impact of this strategy on purchase behavior of spectators- as the main customers of football clubs.
Dr Mahdi Nabavinik, Dr Hamidreza Taheri, Dr Alireza Saberi Kakhki, Dr Hamidreza Saberi Kakhki,
Volume 13, Issue 25 (9-2023)
Abstract
Massive amount of practice over many years raise the question that handling class of action by generalized motor program may modify over years. The purpose of the present study is to provide evidences to investigate this hypothesis by examining the pattern of co-activation and agonist to antagonist activity ratio. Seven experienced darts players were asked to execute from standard dart distance (fourth distance) and six other farther and nearer distances, making 252 throws. Relatively, the results showed that at least in five from the seven samples, there was a significant difference in muscle co-activation between fourth and six other distances. These findings do not support the existence of a generalized motor program at fourth distance so that performance of elite players met limited generalizability
Davoud Fazeli Kasrineh, Hamidreza Taheri, Alireza Saberi Kakhki,
Volume 14, Issue 27 (8-2024)
Abstract
The purpose of this study was to investigate the effect of practice variability in physical compared with observational practice on golf putting performance. To this end, 50 male right-handed students (25±3.7 years) participated in this study. Participants were randomly divided into 5 groups (physical constant, physical variable, observational constant, observational variable, and control). During acquisition, the physical variable group randomly performed 50 trials from 5 different starting points to 2 different targets, but the physical constant group performed 50 trials from one starting point to one predetermined target. The observational variable and constant groups observed the performance of the physical variable and constant groups, respectively. The control group just participated in pre-and post-tests. Participants performed a test just like the pre-test 10 minutes and also 24 hours after practice. Putting accuracy was measured as the dependent measure. Results showed that variability of practice had a positive effect on performance than constant practice in physical and observational conditions. Maybe the similar underlying mechanisms and also the similar feedback effects resulted in the higher performance of the variable group than the constant group in physical performance and action observation.
