摘要：Encouragement and motivation, among the environmental factors effective on performance and learning, have had a considerable role in creating different levels of arousal which unconsciously occur in competition and competitive environments (Gallahue, 2001). According to importance of drill environments in learning motor skills and necessity of determining each of environmental factors role in learning tasks we decided to determine the effect of various practicing environments and types of skill and interacting these two on performance in acquisition and retention phases. The current study is quasi-experimental which was done through field method. To assess the achievement procedure in each six group, dependent T test for pretest, acquisition and retention, while factor analysis and Tuckey HSD test was used for comparing effect of three types of environmental conditions with two skills on performance in acquisition and retention periods. We used drills to create various motivational environments in competitive, noncompetitive and combined environments and also we used tennis Scot and Fox (Scot and French, 1959) as closed skill and die test as open skill. Results showed that performance in closed and open skills in different practicing environments in pretest, acquisition and retention had significant difference.
