the effects of speed and sensory feedback manipulation on the performance of in-phase and anti-phase patterns of bimanual coordination

the aim of the present study was to investigate the manipulation of senses and speed on the performance of bimanual dynamic coordination. thus, 15 physical education students of shahid beheshti university with age range of 18-25 years performed in-phase and anti-phase patterns from slow to fast speed in five different sensory conditions. to investigate two motor patterns anova with repeated measures  (5 sensory conditions × 3 speeds) on each in-phase and anti-phase pattern. bonferroni post hoc test was used to analyze their following effects. the dependent variable was error of relative phase. results showed that increasing the speed of performance influenced the performance of the anti-phase pattern  (p=0.001), but it did not influence the in-phase pattern  (p=0.9). sensory manipulation results indicated that proprioception and vision manipulation had an effect on the accuracy and the variability of performance of two relative phases of motor patterns  (p=0.001), but audition manipulation did not affect these patterns  (p=0.315). in addition, the highest mean of error of relative phase and standard deviation of error of relative phase were observed in proprioception manipulation  (p=0.001). it can be expressed that the bimanual linear coordination task in this study was a proprioceptive dependent task.