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The authors wish to add the following correction to their paper published in International Journal of Environmental Research and Public Health [...].

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To date, no instrument adapted and validated that measures engagement and disaffection in the physical education class has been found, which limits the generation of knowledge of this area in Mexico. The aims of this study were to translate and adapt the engagement and disaffection scale to the context of physical education in Mexico and to examine its reliability, structure (two and four factors), and factorial invariance by gender in Mexican fifth- and sixth-grade elementary school students. A total of 1470 students participated (50.6% boys) with ages between 10 and 14 years (mean (M) = 10.56; standard deviation (SD) = 0.77) from federal (89.3%) and state (10.7%) elementary schools. Two factorial structures were tested (with four factors and two factors). The fit indexes of both models were satisfactory, and the factorial saturations were significant. The differences between the fit indexes of both models were irrelevant; therefore, the two-factor model was considered more suitable. The total strict invariance by gender was confirmed, and the reliabilities of the engagement and disaffection scale were acceptable. The Mexican version of the course engagement and disaffection scale in physical education is valid and useful to measure these constructs in the context of physical education in Mexico.

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Abstract The lack of valid tools to measure variables related to healthy behaviors in Mexico has led the authors to adapt and validate the Grit Scale and the Treatment Self-Regulation Questionnaire (TSRQ) for diet into Mexican Spanish, and explore the relationship between grit and types of motivation towards healthy eating as evidence of validity. The Grit Scale and the TSRQ in Spanish were put to 353 adults from the state of Nuevo León, Mexico. The Grit Scale was composed of 12 items distributed into two factors (consistency of interest and perseverance of effort), and the TSRQ for diet was composed of 15 items distributed into three factors (autonomous motivation, controlled motivation, and amotivation). Results showed acceptable fit indices for the long and short versions of the Grit Scale, confirming its two-factor structure. In addition, acceptable fit indices were found for the TSRQ for diet, indicating the presence of three latent factors. Significant and positive relationships were found between grit and autonomous motivation, and negative relationships with controlled and amotivation. The analyses carried out indicated that the instruments administrated are valid and reliable tools for use in Mexico.

Resumen La ausencia de instrumentos válidos para medir variables relacionadas con las conductas saludables en México, nos lleva al objetivo de adaptar y validar al idioma español hablado en México la escala Grit y el cuestionario de autorregulación del tratamiento (TSRQ) de la dieta, y explorar la relación entre el Grit y la motivación hacia la alimentación saludable como evidencia de validez. 353 adultos del estado de Nuevo León respondieron a la escala Grit adaptada al español conformada por 12 ítems distribuidos en dos factores (consistencia del interés y perseverancia del esfuerzo) y al TSRQ adaptada al español compuesto por 15 ítems en tres factores (motivación autónoma, motivación controlada y no motivación). Los resultados mostraron índices de ajuste aceptables para la versión larga y corta de la escala Grit confirmando su estructura bifactorial. Además, se encontraron índices de ajuste aceptables para el TSRQ de la dieta indicando la presencia de tres factores latentes. Se observaron relaciones significativas y positivas entre el Grit y la motivación autónoma, y de manera negativa con la motivación controlada y no motivación. Los análisis realizados indican que los instrumentos administrados son herramientas válidas y confiables para ser utilizadas en México.

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