本研究以Ajzen的計劃行為論（the Theory of Planned Behavior）為依據，主要目的在瞭解本研究對象騎機車戴安全帽的行為意圖、行為及其影響因素。同時並比較理性行動論與計劃行為論兩者應用在騎機車戴安全帽行為上的適切性。
本研究以臺北縣亞東工專日間部（二專）二年級所有騎機車男生為母群體，以簡單隨機集束抽樣方式抽出調查楢進行施測。研究工具為開放式引導問卷、結構式問卷及電話訪問問卷，研究者依據開放引導問卷填答結果篩選出顯著信念，再自編而成結構式問卷以供集體施測，之後再以電話訪問方式追蹤一個月後的行為。結構式問卷共得到202份有效問卷，行為追蹤則完成了180人。
本研究的重要結果如下：
一、本研究對象騎機車戴安全帽的行為可以由行為意圖和知覺行為控制來預測，此二變項共可解釋行為46.7%的變異量，其中行為意圖和知覺行為控制之間尚存有交互作用。
二、騎機車戴安全帽的意圖是受到態度、主觀規範、知覺行為控制三者的影響，三者可以解釋行為意圖47.7%的變異量。
三、態度與結果信念、結果評價的交乘積和（ΣBi*Ei）為中等程度的正相關；主觀規範與規範信念、依從動機的交乘積和（ΣNBj*MCj）呈中等程度的正相關；知覺行為控制與控制信念之間也是中等程度的正相關。
四、行為不同者僅在沒有女朋友者的規範信念上未達顯著差異，其餘各類信念都有整體性的差異存在。有／無意者則在結果信念、結果評價、依從動機及控制信念上有整體性的差異存在。
五、外在變項對於騎機車戴安全帽的行為意圖及行為均有直接的影響，且以過去習慣的影響最大，此一結果與理論的假設不符。
整體而言，本研究的結果支持計劃行為論的假設，並且發現計劃行為論應用在騎機車戴安全帽行為上的適切性優於理性行動論。

The purpose of this study was to predict and understand the male students' intentions and behavior to use motorcycle helmets on the basis of the Ajzen's Theory of Planned Behavior (TPB),and to compare the Theory of Reafsoned Action (TRA) with TPB in terms of their ability to predict intentions and behavior.
Data were collected during questionnaire surveys on a cluster sample of 202 male students who operate motorcycles in a junior college. A follow-up telephone interview of the sample was conducted approximately one month later. Self-reported data on subsequent helmet-use behavior were obtained from 180 of the 202 subjects, a 89% response rate. Results showed that percerived behavioral control and intentions were together moderately successful in predicting subjects'behavior to use a helmet. Besides, there was a positive interaction between perceived behavioral control and intentions. In support of the theory, intentions to use a safety helment when riding a motorcycle were accurately predicted on the basis of attitudes, subjective norms, and perceived behavioral control. Findings of this study should be useful in developing and targeting informational and eductional approaches designed to motivate voluntary use. In sum, the results of this study supported the hypothesis of the TPB and revealed that the TPB permitted more accurate prediction of intentions and behavior with respect to use a motorcycle helment than did the TRA.