บทคัึϸ่อวราภรณ์ หลายทวีวัฒน์This document describes a study that used purposive sampling to select 36 participants who were divided into two groups of 18 each. The study measured two variables, p and r, before and after an intervention for each group. Statistical analysis using dependent t-tests found no significant differences between the groups for either variable at the 0.05 level.