There is evidence showing that the triarchic model of grit and its dimensions (i.e., "perseverance of effort," "consistency of interests," and "adaptability to situations") predict engagement and well-being outcomes in high school and undergraduate students during the COVID-19 pandemic outbreak. However, there has been limited research on how this model of grit relates to engagement and optimal psychological outcomes in primary school students. This research investigates the association of grit's dimensions with academic engagement in math and science as well as well-being outcomes (i.e., positive emotions, negative emotions, and flourishing) in primary school students. Participants were primary school students (M[subscript age] = 10.42; SD[subscript age] = 1.26) from Hong Kong (n = 279) and Macau (n = 124). Results showed that "perseverance of effort" positively predicted cognitive and behavioral engagement in math as well as positive emotions even after controlling for demographic covariates (i.e., age, gender, setting, and year level), conscientiousness, and achievement goal orientations. "Adaptability to situations" positively predicted cognitive and social engagement in math and flourishing. "Consistency of interests" negatively predicted both cognitive engagement in science and negative emotions. Indeed, this study indicates that "perseverance" and "adaptability" may facilitate children's positive academic and psychological functioning during the COVID-19 pandemic outbreak. Copyright © 2023 SAGE Publications.

Research has shown that the triarchic model of grit scale (TMGS)—a measure that assesses tendency to show perseverance, passion, and adaptability for long-term goals—has been valid in different contexts such as the Philippines, Japan, Poland, mainland China, and the United States. However, there is limited research on the validity of this scale in Hong Kong. Against this backdrop, this research examined the structural, convergent, and criterion-related of the TMGS among secondary school students in Hong Kong. A total of 298 secondary school students in Hong Kong participated in this study. Confirmatory factor analysis (CFA) was used to evaluate the structural validity of the three-factor model of grit. Correlational analysis was conducted between grit's dimensions and school satisfaction to assess the criterion-related validity of this scale. CFA showed that the scores from the three-factor model of grit underpinned by perseverance of effort, consistency of interests, and adaptability to situations were valid and reliable. There was mixed evidence on the convergent validity of the scale based on the subscales’ composite reliability (CR) estimates. Whereas perseverance of effort and adaptability to situations were positively correlated to school satisfaction, consistency of interests was negatively linked to the said criterion variable. This research demonstrates the potential applicability of the TMGS in Hong Kong. Copyright © 2023 The Authors. Psychology in the Schools Published by Wiley Periodicals LLC.