Abstract
The purpose of this study was to develop the instrument to assess the school-age children's sense of mastery related to having injection and venipuncture. An 11-item self-report instrument of "School-age Children's Sense of Mastery" was developed to measure children's perception of mastery experience of how much they dealt with the episode of having painful medical procedures. Items were generated based on the result of a fieldwork and two other research works on school-age children's mastery experience. Through content analysis, items were supported as relevant to the concept definition. Conceptual correlations between "School-age Children's Sense of Mastery" with "Stress Coping Scale for Children" L = .31, p < .01) and "Self-esteem Scale" (L- = .45, p < .001) supported it's conceptual validity. Cronbach's a for the entire instrument was .86, and the result of test-retest (r = .78, p < .001) supported it's reliability.
