The Relationship Assessment Scale (RelAS) is one of the main tests to assess the relationship's satisfaction used worlwide. This is a single-factor test with seven items. This present study aimed to show the psychometric properties of the scale in Brazil. The test was applied on 1549 participants from 12 Brazilian states and the Federal District. Most of the data were collected in universities. Data were analyzed according to the Classical Theory of Tests and the Item Response Theory. Single-factor structure and good reliability (α=0,85) were replied and the scale had discriminative items (parameter a). Most of the difficulties of the items (parameter b) were easy and medium, which made the scale informative for subjects below 80 percentile. The RelAS is a simple, short, and useful instrument to assess the satisfaction in the relationship also in Brazil.
Emotional states; Marital relations; Item Response Theory; Satisfaction; Psychosexual behavior
