This study examined the relationships between grit personality, self-efficacy, motivation (autonomous, controlled, and amotivation), and the readiness to change index toward exercise. Participants were 391 adults aged between 18 and 64 years old (M = 31.16; SD = 12.45) from Hermosillo, Sonora (Mexico) who completed questionnaires (i.e., the Grit Personality Scale, the Exercise Self-Efficacy Questionnaire, the Treatment Self-Regulation Questionnaire and the Stages of Change Questionnaire for Physical Activity) measuring the variables of interest. The reliability of the instruments was tested using Cronbach's alpha, whereas confirmatory factor analyses were performed for each instrument separately. A measurement model and a structural equation model were assessed as well. The results of the structural equations model showed that grit personality was positively associated with self-efficacy, and in turn, with autonomous motivation and with the readiness to change index. On the other hand, self-efficacy was negatively correlated with controlled motivation, and positively correlated with the readiness to change index. Finally, self-efficacy also showed a negative correlation with amotivation, which, in turn, was negatively correlated with the readiness to change index. These results provide information to develop psychological intervention programs based on grit personality and motivation, with the aim of increasing the number of participants who engage in exercise.
Debido a las altas tasas de sedentarismo que presenta la población mexicana y las diferencias por género reportadas en otros estudios en las etapas de cambio, es necesario contar con un instrumento fiable y valido para medir las etapas de cambio hacia el ejercicio físico en la población mexicana indistintamente del género. El objetivo de este estudio fue confirmar la estructura factorial y analizar las propiedades psicométricas e invarianza factorial a través de los grupos de género del URICA-E2 en la población adulta mexicana. La muestra estuvo conformada por 871 personas adultas (49.19% hombres, 50.81% mujeres, Medad = 33.26; DT = 13.99; rango = 18–76 años) habitantes del área metropolitana de Monterrey, Nuevo León y Hermosillo, Sonora, México. Se utilizó una versión del URICA-E2 traducido al español, adaptado al contexto y cultura mexicana. Se evaluó la consistencia interna, la fiabilidad compuesta y la varianza media extraída. De igual forma, se analizó la validez convergente y discriminante del instrumento. El análisis factorial confirmatorio, demostró una estructura de seis factores y los análisis multigrupo apoyaron la invarianza factorial estricta de la versión mexicana del URICA-E2 a través de los grupos de género. Los resultados mostraron una consistencia interna aceptable y brindaron evidencia de la validez convergente y discriminante de la versión mexicana del URICA-E2. La versión mexicana del URICA-E2 es un instrumento válido y fiable que puede ser utilizado en estudios futuros. Abstract. Due to the high rates of sedentary lifestyle that the Mexican population presents and the differences by gender reported in other studies in the stages of change; it is necessary to have a reliable and valid instrument to measure the stages of change towards physical exercise in the Mexican population regardless of gender. The purpose of this study was to confirm the factorial structure and to analyze the psychometric properties and factorial invariance across the URICA-E2 gender groups in the Mexican adult population. The sample consisted in 871 adults (49.19% men, 50.81% women, Mage = 33.26; SD = 13.99; range = 18 - 76 years) inhabitants of the metropolitan area of Monterrey, Nuevo León and Hermosillo, Sonora, Mexico. A version of the URICA-E2 translated into Spanish was used, adapted to the Mexican context and culture. Internal consistency, composite reliability, and average variance extracted were evaluated. Similarly, the convergent and discriminant validity of the instrument was analyzed. Confirmatory factor analysis demonstrated a six-factor structure and multigroup analyzes supported the strict factor invariance of the Mexican version of URICA-E2 across gender groups. The results showed an acceptable internal consistency and provided evidence of the convergent and discriminant validity of the Mexican version of the URICA-E2. The Mexican version of the URICA-E2 is a valid and reliable instrument that can be used in future studies.
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