Testing Tools
The researchers created a questionnaire to determine the accuracy. And for the confidence follows.
1. Accuracy (Validity), the researchers created a questionnaire and take a test, made a presentation to the advisory committee. To verify the validity of the content (Content Validity) to improve the content covered by the examination results consistent between the test and indications or learning outcomes expected of 3 experts on the validity (Validity). equal. 9729
2. Determination of confidence. (Reliability) The research has led to improved test questionnaire (Try out) school students in Professor Prince Mahidol well. (Junior high school), and left school Wittayanusorn. (High school) in Nakhon Ratchasima province, and a close study of 30 subjects were then tested to find it in a variable. Have the confidence (Reliability) equal. 8089
3. The validity (Validity) and confidence. (Reliability) used to measure the coefficient alpha.
The Cronbach (Cronbach's Coefficent Alpha).