The relation of morphological awareness with reading comprehension is well established. For this advance to inform instruction, the push is now on to understand how morphological awareness is related to reading comprehension. We address this question here by examining potential mechanisms. We do so with children in Grade 1, a time at which it is…

Vocabulary knowledge was tested in a native (Cantonese-Chinese) and foreign (English) language in 150 twins and 150 singletons aged 6-11 years, matched on age, gender, grade level, nonverbal intelligence, parents' education, family income, and number of siblings and household members. The singletons clearly outperformed the twins on the native…