This study aims to advance our understanding of the role of word knowledge in second language (L2) reading comprehension by exploring whether morphological awareness and vocabulary assessed one year ago contribute to decoding and listening comprehension which in turn contribute to reading comprehension in Chinese children learning English as an L2. A total of 167 Grade 3 and 4 primary school students (Mage = 8.99 years) in Hong Kong were tested on English morphological awareness and vocabulary at Time 1, and they were also tested on English decoding, listening comprehension, and reading comprehension at Time 2, one year later. Our regression models showed that word knowledge tested at Time 1 was a significant predictor of decoding, listening comprehension, and reading comprehension at Time 2; and word knowledge explained more variance in decoding, listening comprehension, and reading comprehension in children who had higher levels of word knowledge. The results of structural equation modeling indicated that vocabulary contributed to reading comprehension fully through decoding and listening comprehension. Morphological awareness contributed to reading comprehension partially through vocabulary and decoding, and it also had a unique direct contribution to reading comprehension. The findings from this study suggested the importance of emphasizing word knowledge in developing children’s reading comprehension in an L2 at an early stage of learning to read. Copyright © 2022 The Author(s), under exclusive licence to Springer Nature B.V.

Decoding and language comprehension skills have been found to be the core components of reading comprehension across many writing systems. The present study examined the contributions of vocabulary and some discourse-level skills to reading comprehension in Chinese in addition to that of decoding. One hundred and seventeen Chinese second and third graders in Hong Kong were tested on decoding, vocabulary, discourse-level skills, and verbal working memory. Results of multiple regression analyses showed that the discourse-level skills contributed an additional 5% of variance to reading comprehension over decoding, vocabulary, and other control variables, and all factors accounted for a total of 70% variance in reading comprehension. Further path analysis showed that all the direct paths of word reading, vocabulary, text-structure knowledge, and topic knowledge to reading comprehension were significant. Vocabulary also contributed to reading comprehension through indirect paths to discourse-level knowledge. The present findings support the simple view of reading with elaborations on the language comprehension component, namely, (a) vocabulary is a foundational language skill for text comprehension through its role on discourse-level knowledge, and (b) some discourse-level knowledge also plays an important role in passage comprehension. Copyright © 2018 Cambridge University Press.