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Background: The authors assessed the effect of bandwidth modeling in learning relative timing and absolute timing. Method: Participants were 10 male high school students who volunteered to participate in the experiment (M age = 16 years, SD = 0.942 years). None of the participants had prior experience with the task or was informed about the purpose of the experiment. They had to learn soccer chip shot under either a bandwidth (model delivered when participant’s performance was outside a predefined bandwidth or rang) or yoked (same number of model provided as bandwidth group) modeling procedure. Results: The results show that the bandwidth group was more effective in learning relative timing than the yoked group. Conclusions: It indicated that benefits of feedback frequency reduction is generalizable to observational learning context. The authors propose that this method may be an appropriate method for relative timing learning.

This experiment assessed the effectiveness of two interventions; mental imagery and physical training as compared to a control group, on their ability to improve visuomotor accuracy, measured by scores achieved on a visuomotor task. For mental imagery participants had to imagine throwing a dart and for physical training participants physically practised dart throwing. Measurements were recorded pre-intervention, after two weeks of training (Mid-intervention), after five weeks of training (Outcome Measure 1) and two weeks after training (Outcome Measure 2). Comparison of Mid-intervention, Outcome Measure 1 and Outcome Measure 2 with baseline showed both interventions to significantly increase performance on dart throwing compared to the Control group. Our findings show that, as well as traditional physical practise, mental imagery can effectively improve performance on a fine visuomotor task. This is an important finding highlighting possible applications of mental imagery in those with limited motor abilities to maintain or enhance motor movement.

Objective : Football, as the most viewed event in stadiums overflowed with very many spectators, has turned into the most popular sport across the world. The purpose of this study was to compare the factors affecting the technical and ethical performance of professional football athletes off-field. Methodology : The research method of this research is descriptive survey implemented by completing a researcher-made questionnaire. The statistical population of the study included all athletes, referees, and coaches, members of the technical staffs and members of professional soccer clubs as well as members of the federation and football board of Tehran during the 18 th round of the country premier league. The research sample was 384 people who were selected by purposeful sampling method and according to Morgan table. The validity of the questionnaire was evaluated by the professors of physical education and football experts and the reliability level was calculated to be 0.89 based on the Cronbach's alpha that was done by Exploratory Factor Analysis and Friedman test by SPSS version 24 and Liserl 8.8 software. Results: The present study was surveyed on the basis of effective factors off-field, that is the most important factors off-field were federation and family and the status of the club were the least important factor in the technical and ethical performance of professional football athletes. Conclusions: Supervision and education can play an important role, and family as the first social unit can be also of importance in this respect. After family, the FFIRI should take basic measures for culture-building and detailed reflections on its activities.