Effects of task instructions and oscillation frequency on bimanual coordination

摘要: Increases in the oscillation frequency of bimanual movements produce a switch from an anti-phase (180° relative phase) to in-phase (0° coordination pattern. This finding is observed when subjects are instructed not intervene they feel themselves slipping out The question addressed this study concerned how performance would be affected if were try maintain pattern at all times. issue was using two separate groups subjects: one group given “do intervene” instructions, other told stay with Forearm rotations tested 15 s trials, paced by auditory metronome set 1.0, 1.5, 2.0, 2.5, and 3.0 Hz. Frequency distributions point estimates phase analyzed. Do Intervene replicated previous findings, as indicated development bimodal histogram increases frequency. However, very different findings emerged for Rather than distribution being developed, data maintained 180° its central tendency — no secondary developed around 0° phase. These suggest that volitional control can over-ride inherent dynamical tendencies motor system.