三七、黄芪、五味子、枸杞对小鼠SOD活性的影响

本实验研究了三七、黄芪、五味子、枸杞四味中药分别对小鼠血液以及脑、肝组织中超氧化物歧化酶 (SuperoxideDismutose简称SOD)活性的影响。结果表明 4味中药均能不同程度地使小鼠血液中以及脑、肝组织中SOD活性增高     

What is the best model of grit among junior high students: Model selection,measurement invariance,and group difference

Grit is a non-cognitive construct based on personality theory that fosters individuals to perform better and achieve their goals. Previous researchers validated the psychometric properties of grit for adults and older adolescents but ignored that for early adolescents. An inappropriate measurement model may mislead researchers and teachers to misapprehend grit measures. This study aimed to identify the most appropriate grit model for early adolescents. Three factorial models (i.e., two-factor, one-factor, and bi-factor models) were evaluated and compared. Subsequently, we tested the measurement invariance (MI) and mean differences of grit across grade and gender groups. Participants were 672 junior high students (51% boys, aged 12–15) in Taiwan. The results showed that the two-factor model was the best grit model. This finding revealed that adolescents tend to comprehend grit with two distinct concepts, consistency in interest (CI) and perseverance of effort (PE), instead of a single compound. In addition, the results showed that the two-factor model retained strong invariance for grade and gender, justifying the comparison of grit scores over grade and gender groups for junior high students. Moreover, we did not find any group difference in the facets of grit by gender and grades. This result showed that grit is a stable personality for junior high students. The relationships between grit constructs and criteria, such as conscientiousness and academic achievements, were tested and discussed.     

第二语言习得中母语迁移现象分析

根据语言共性与语言标记性理论,结合第二语言教学实践收集的资料,分析第二语言习得中母语迁移现象,结果表明:与对比分析假设相比较,语言标记性理论对于解释母语迁移现象及第二语言习得者面临的学习困难有较明显优势。