本研究的目的主要在探討不同的工作與環境限制對男童投擲動作型式的影響。實驗參加者為24位國小高年級的男學童，平均年齡為11.86歲，以手拿手球投擲做為本實驗的工作，工作的限制有兩種：(一)用力性投擲，(二)準確性投擲；環境的限制為不同的投擲距離，有六種：分別為5至15公尺。本研究的自變項為不同的工作與環境限制；依變項為不同的投擲動作因素的層次、投擲動作的穩定性、投擲動作的速度，和投擲動作的準確度。實驗開始之前，先對30位施測兩種不同的工作限制，及六種不同環境限制的投擲前測，經檢測其投擲速度，及計算投擲點距目標區中心點的距離後，篩選合於規定的實驗參加者，之後對其投擲動作進行動作因素的層次的評定。經皮爾遜積差相關、相依樣本二因子變異變分析，及百分比描述統計分析，發現：在投擲動作因素的層次和穩定性方面，不同的工作與環境限制達顯著水準；在投擲的動作速度與準確度方面，不同的工作和環境限制達顯著水準，且不同的工作與環境限制有交互作用。因此，本研究的結論為：不同的工作限制會對投擲的動作型式產生影響；不同的環境限制也會對投擲的動作型式產生影響。

The purpose of this study was to examine the overhand throwing patterns as a function of task and environmental constraints. Twenty-four male participants were chosen from elementary school students (mean age = 11.86). The participants were asked to perform overhand throw under two constraints: (1) task constraints: throwing for force throwing for accuracy, and (2) environmental constraint: the throwing distance ranging from 5 to 15 meters. The independent variables were task and environmental constraints, and the dependent variables were the velocity, accuracy, stability and level of the components of throwing patterns. According to the throwing speed and accuracy. The participants went through motor component analysis and the scores of trials were analyzed using Pearson Product-moment correlation method, Repeated Two-way ANOVA, and percentage descriptive statistics. It was found that there were statistically significants between the task constraints and the environmental constraints in the stability and the level of component of the throwing patterns. Statistical interactions were also found between the task constraints and the environmental constraints in the velocity and accuracy of the throwing patterns. Therefore, the throwing patterns were significantly affected by task and environmental constraints.

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