Populations and samples3.1.1 population this study population as injuries from motorcycle ride, both male and female in Khon Kaen province in the year 2559 during October – November 2559 2559.3.1.2. Researchers randomly selected samples and sample (Random Sampling) by setting the properties of the sample as follows:3.1.2.1 are those who have been injured, from driving a motorcycle has a sensible reading, writing, listening, can provide information, hear, and understand the language better Thailand.3.1.2.2 willing to cooperate in research.Distribution of samples, according to research by objective research. relational dimensions of samples of at least 100 people, and to prevent loss of approximately 10% of the sample used, the number of samples approximately 100 list.
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