INTRODUCTION: This study aims to explore the relationships among psychological  capital, learning motivation, emotional engagement, and academic performance for  college students in a blended learning environment. METHOD: The research consists  of two studies: Study 1 primarily focuses on validating, developing, revising,  and analyzing the psychometric properties of the scale using factor analysis,  while Study 2 employs structural equation modeling (SEM) to test the hypotheses  of relationships of included variables and draw conclusions based on 745 data  collected in a university in China. RESULTS...