Behrouz Abdoli; Nassour Ahmadi; Azam Ghazi
Abstract
According to specificity of practice hypothesis, availability of visual information during practice induces performance decrement in no-vision transfer test. One hypothesis is that full vision as a dominant source of information prevents the processing of other sensory sources, in which case, weakened ...
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According to specificity of practice hypothesis, availability of visual information during practice induces performance decrement in no-vision transfer test. One hypothesis is that full vision as a dominant source of information prevents the processing of other sensory sources, in which case, weakened vision may reduce dominance of vision over other sensory sources. The aim of the current study was to examine the effect of different vision levels and amount of practice on dart throwing accuracy. 30 right-handed female students of Shahid Beheshti University (mean age 22.80±1.47) were voluntarily selected and randomly divided into three groups: full vision, no-vision and weakened vision. The acquisition phase consisted of two phases of low (45 trials) and high (300 trials) amount of practice. Mixed model ANOVA (2x3) showed that removing vision had no deteriorating effect at the beginning of the practice , but it had a deteriorating effect after extensive practice in the performance of full vision group (P=0.001). Moreover, removing vision did not affect the performance of weakened vision group which could indicate that weakened visual might not prevent the processing of other sources of sensory information. The results of this study supported specificity of practice hypothesis after 300 trials of practice with removing vision. But this hypothesis was not supported with adding vision and dominance of proprioceptive information was not observed. It was likely that dependence on dominant sources of information (vision) appeared sooner while dependence on secondary sources of information (proprioceptive) takes more time and appeared after more trials of practice.
Fatemeh Bahrami; Ahmadreza Movahedi; Afeifeh Silani
Abstract
The aim of the present study was to examine the hypothesis of the specificity of practice regarding training place (to determine whether learning a sport skill was specific to the training place). Participants were 30 adolescent female students (mean age 11.50±1.50 years) who performed 10 sessions of ...
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The aim of the present study was to examine the hypothesis of the specificity of practice regarding training place (to determine whether learning a sport skill was specific to the training place). Participants were 30 adolescent female students (mean age 11.50±1.50 years) who performed 10 sessions of learning perceptive-motor skill of Kata in Karate. After they finished Kata sessions, retention test was performed in the training place and transfer test in a different place and Kata scores were measured. To analyze the data, independent t test was used. Results showed that the subjects achieved their peak performance in the training place while their performance deteriorated significantly in the different place. It seems that the performance of the task was related to the place of training. The findings of this study provided evidence to support the specificity of practice hypothesis.
