Chiarenza G A, Barzi E, Beretta E, Villa M
Istituto di Neuropsichiatria Infantile, Università degli Studi di Milano, Italy.
Electroencephalogr Clin Neurophysiol Suppl. 1990;41:172-6. doi: 10.1016/b978-0-444-81352-7.50022-4.
The effect of an intensive training period and that of a time-distributed training on skilled performance positivity (SPP) have been studied. SPP is a potential associated with knowledge and evaluation of the results of a goal-directed bimanual self-paced task requiring particular ability. Nine subjects with average intelligence but with some difficulties in the motor-perceptive sphere were studied. The task consisted of initiating the sweep of an oscilloscope with a self-paced movement and terminating it within 50 msec +/- 10 msec. The subjects had to repeat this task several times at various time intervals. The electrical activity was recorded from Fpz, Fz, Cz, Pz, P4, P3 and the right/left precentral areas. For each performance, performance time, performance shift taken as the accuracy index, as well as the percentage of target performances were evaluated. Motor performances improved with both distributed and intensive practice. Only distributed practice had a significant effect on SPP latency and amplitude. SPP latency decreased in all brain areas, whereas amplitude increased in the prefrontal, frontal and left precentral areas. These results seem to suggest that the performance evaluation processes take place more quickly and efficiently through distributed practice.
研究了强化训练期和分散式训练对技能表现积极性（SPP）的影响。SPP是一种与对需要特定能力的目标导向双手自定节奏任务的结果进行知识掌握和评估相关的潜能。研究了9名智力中等但在运动感知领域存在一些困难的受试者。任务包括以自定节奏的动作启动示波器扫描，并在50毫秒±10毫秒内终止。受试者必须在不同时间间隔重复此任务几次。从Fpz、Fz、Cz、Pz、P4、P3以及左右中央前区记录电活动。对于每次表现，评估表现时间、作为准确性指标的表现偏差以及目标表现的百分比。分散式和强化训练均能提高运动表现。只有分散式训练对SPP潜伏期和波幅有显著影响。所有脑区的SPP潜伏期均缩短，而前额叶、额叶和左中央前区的波幅增加。这些结果似乎表明，通过分散式训练，表现评估过程进行得更快且更有效。
