Studies in this study in a sample of one of the elementary schools in the province of saraburi. Therefore, it cannot be applied to findings in reference populations whose characteristics differ from samples.
Research in this study in a sample of elementary schools, one in Saraburi province. So it can not be a reference to findings in a population with characteristics different from the sample.
The objective of this research was in a sample of a primary school in Saraburi Province Therefore, the research results in references in a population with different from the samples