Faranak Poorhosseini; Mehdi Shahbazi; Shahzad Tahmasebi Boroujeni
Abstract
The aim of this study was to investigate the emergence of special skill in basketball free throw at different skill levels based on Newell's model of learning stages. Participants were assigned to three skill groups (n=10): coordination group, coordination control group, and optimization group. They ...
Read More
The aim of this study was to investigate the emergence of special skill in basketball free throw at different skill levels based on Newell's model of learning stages. Participants were assigned to three skill groups (n=10): coordination group, coordination control group, and optimization group. They threw 350 fixed shots from 7 parametric points (2.74, 3.35, 3.96, 4.57, 5.18, 5.79, 6.4), carrying out 50 shots in each point. Regression analysis showed that the accuracy of those who were in the third stage of Newell's model in 4.57 m point, which is the same line of penalty, was significantly higher than the anticipated regression equation and supported the emergence of special skill (P>0.05), but the rest of the points did not follow the principles of force variability and performance accuracy decreased by increasing distance parameter. Moreover, multiple regression analysis showed that the rest of the points had no contribution to the emergence of special skill and this conclusion may be the reason for rejecting generalized theory in the creation of special skill.
Franak Poorhosseini; Shahzad Tahmasebi Boroujeni
Abstract
The aim of this study was to investigate the effect of music types on depth perception during fatigue. Statistical population consisted of female students of Faculty of Physical Education at University of Tehran. 45 subjects (mean age 23.3 ± 2.16 years) voluntarily participated in this study. ...
Read More
The aim of this study was to investigate the effect of music types on depth perception during fatigue. Statistical population consisted of female students of Faculty of Physical Education at University of Tehran. 45 subjects (mean age 23.3 ± 2.16 years) voluntarily participated in this study. Participants were divided into three groups: slow music, fast music and control. Initially, all subjects participated in the pretest of depth perception using depth perception apparatus. Then, they received a similar exercise until reaching the threshold of exhaustion. After reaching fatigue, their error of depth perception was reassessed. Then, participants were asked to listen to the music specific to each group for 3 minutes in order to assess the effect of music on their depth perception during fatigue. Their depth perception was immediately measured as the posttest. Analysis of variance with repeated measures and one-way analysis of variance were used to analyze the data. The results showed that fast music did not significantly change depth perception error (P=0.602), but slow music significantly reduced this error (P=0.006).