Evaluation of the psychometric properties of the mood states assessment scale in Peruvian population groups

Mood state is an important component of mental health, and its evaluation requires valid and reliable instruments adapted to the sociocultural context of application. The present study evaluated the psychometric properties of the mood states assessment scale (MSAS) in the Peruvian population. An instrumental design was used with a sample made up of adolescents, young people, adults and older adults (2220), collected during the last semester of 2024. A confirmatory factor analysis was applied, confirming the structure of four dimensions: depression, anxiety, joy and hostility, evidencing an adequate adjustment (χ2(98) = 2186.15; CFI = .989; TLI = .987, RMSEA = .069; SRMR = .047), and for the reliability of the scale, values from .90 to .95 (Cronbach's Alpha and Omega) were found in the dimensions of the scale. Therefore, it is concluded that the MSAS is presented as a brief, reliable and theoretically sound instrument for emotional assessment in the Peruvian population.