Lexical richness development in Chinese second language writing: empirical research based on Cambodian Chinese learners

Abstract This study investigates the developmental features of lexical richness in Chinese compositions by Cambodian native speakers (n = 40) and the relationship between lexical richness and writing quality in Chinese Second Language (CSL) writing from three dimensions of lexical variation, lexical sophistication and lexical error rate.The results show that with the improvement of Chinese level, there are notable increases in lexical variation (p = 0.000 < 0.05) and lexical sophistication (p = 0.000 < 0.05). As for lexical errors, the overall lexical error rate is decreasing. Among which, the form error rate is decreasing obviously (p = 0.000 < 0.05), while the usage error rate is increasing, but not significantly (p = 0.039 > 0.005). Multiple regression analysis shows that lexical sophistication and lexical error rate are more closely related to CSL writing quality, which can predict writing quality well, while lexical variation has less impact on writing quality.