Nasibe Hatami; Shahzad Tahmasebi; Mehdi Shahbazi
Abstract
Nowadays, universities are known as the main context of thinkingNowadays, universities are known as the main context of thinking and contemplation and students have an essential role in the development of the society.Therefore,factors affecting educational and research performance are of great importance ...
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Nowadays, universities are known as the main context of thinkingNowadays, universities are known as the main context of thinking and contemplation and students have an essential role in the development of the society.Therefore,factors affecting educational and research performance are of great importance .The aim of the present study was to investigate the effect of PETTLEPimagery on bilateral transfer of handball skill.The Sample included B.Sc students in physical education at the University of Tehran,24 of which participated in this research voluntarily. After taking part in the pretest, the participants were randomly divided into2groups of imagery with dominant hand and non-dominant hand.Then PETTLEP imagery was applied on both groups for12 sessions.A posttest similar to the pretest was done after the last session.This was followed by aretention test after 24 hours and then a transfer test in the form of handball tripleshootafter30minutes.After ensuring the consistency of variances by Leven test and normality of the data by Shapiro-Wilk test,a multivariate analysis of variance(MANOVA)and an analysis of variance with repeated measures with a significant level of α=.05 were used.The results showed that intervention of PETTLEP imagery had a significant effect on skill transfer through the entire process(P≥.05).Thus,PETTLEP imagery causes the occurrence of bilateral transfer. Therefore, PEETLEP mental imagery is recommended to be used for the improvement of people's skill when employing bilateral transfer. Therefore, PEETLEP mental imagery is recommended to be used for the improvement of people's skill when employing bilateral transfer. Therefore, PEETLEP mental imagery is recommended to be used for the improvement of people's skill when employing bilateral transfer.
Mohammadreza Doustan; Leila Farzad; Esmaeel Saemi; Maliheh Niknam
Abstract
The aim of this study was to investigate the effect of handedness and task difficulty on effective target width and temporal accuracy of the Fitts’ speed-accuracy tradeoff task. The present study was semi-experimental and the tools used included Edinburgh handedness questionnaire, light pen, speed-accuracy ...
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The aim of this study was to investigate the effect of handedness and task difficulty on effective target width and temporal accuracy of the Fitts’ speed-accuracy tradeoff task. The present study was semi-experimental and the tools used included Edinburgh handedness questionnaire, light pen, speed-accuracy measurement device, laptop, chronometer, and metronome. The statistical population consisted of students aged between 14 and 15. The sample included 20 students who participated in this study by convenience sampling method. They were divided into two groups: left-hand and right-hand (each group 10 subjects). Each participant performed 4 trials (each trial 30 seconds) of dual target tapping task in rhythm with the metronome sound. The trials consisted of two easy and difficult tasks and each subject performed each task with dominant and not-dominant hands in rhythm with the metronome sound set up at 300 milliseconds. For statistical analysis of data, variance analysis with repeated measures was used at the significance level of 0.05. The results showed that in dominant hand, the handedness and difficulty of the task had no significant effect on the effective width of the target (P=0.973, P=0.611). Also, the handedness did not affect the average time lag (P=0.135, P=0.785), but in non-dominant hand, the average time lag was more for the difficult task than the simple task (P=0.001). In difficult tasks, participants seem to be trying to keep the spatial error rate constant by reducing the speed of the movement and to sacrifice speed for the spatial accuracy. Also, the time error (mean lag) is more influenced by the difficulty of the task than the handedness.
Zohre Farnaghi; Rokhsareh Badami; Maryam Nezakatalhossaini
Abstract
The aim of this study was to evaluate the effect of handedness and two practice types (explicit vs. implicit) on motor sequence learning. 60 girls (age range of 14 – 17 years old) were randomly assigned to four groups according to their handedness: right–handed-explicit, right–handed–implicit, ...
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The aim of this study was to evaluate the effect of handedness and two practice types (explicit vs. implicit) on motor sequence learning. 60 girls (age range of 14 – 17 years old) were randomly assigned to four groups according to their handedness: right–handed-explicit, right–handed–implicit, left–handed-explicit, and left–handed-implicit. Participants’ task was accuracy and time of sequential reaction. Acquisition phase consisted of 800 practice trials. Participants in explicit practice groups were aware of the arrangement included in stimuli while implicit practice groups were not informed about this arrangement. The day after the acquisition phase, retention and transfer tests were taken. Multiple ANOVA showed that regardless of handedness, implicit practice had more effects on learning reaction time in all three phases of acquisition, retention, and transfer than explicit practice. Regardless of practice type, comparison of right–handed and left–handed subjects was significant in response accuracy in acquisition phase as left–handed subjects were more accurate. The counter effect of handedness and practice type on reaction time and response accuracy was not significant, that is to say right–handed and left–handed subjects had no significant differences in explicit and implicit practice.
