Criação de uma escala de satisfação com a vida por meio da Teoria da Resposta ao Item Development of a life satisfaction scale by Item Response Theory

ABSTRACT Objective: Life satisfaction is a cognitive judgment of some specific areas in life and de-pends on a comparison between the life circumstances of the individual and a standard established by it. The objective of this study was to construct a scale of satisfaction with life by Item Response Theory (IRT). For the creation of the scale we used the Methods:questionnaire “Life Style and Habits Leisure Industry Workers” and Item Response Theory based on the graduated response model proposed by Samejima. The study enrolled 47,477 Brazilian workers in the industry. Results: The scale had seven items the questions of the “health indicators and preventive behaviors” with issues related to health status, quality of sleep, stress level, feelings of sadness or depression and perception of life at home, at work and play. Conclusion: There are few studies that have their focus directed to life satisfac-tion in Brazil, and those who somehow discussed, only included a specific question about