The purpose of this study was to investigate the role of high and low reinvestment in the acquisition, retention and automaticity of dart throwing skill based on the interference-error model. One hundred participants were selected and divided into two categories of high and low movement reinvestment. Subjects of each category were randomly divided into five groups: block-errorless, block-errorfull, random-errorless, random-errorfull and random. Based on the results, the best and worst performance was observed for the random-errorless and random-errorfull groups respectively. There was a significant difference between categories of high and low reinvestment in retention and automaticity tests in favor of low reinvestment. In both the acquisition and retention test, the block groups performed better in the high reinvestment category and the random groups performed better in the low reinvestment category. At the automaticity phase, all groups executed better in the low reinvestment category. The results show that the level of reinvestment can play an important role in learning and automaticity of motor skills. People with lower level of reinvestment perform better in practice conditions with more cognitive effort (random practice) and people with a higher level of reinvestment perform better in practice conditions with less cognitive effort (block practice).
