Reading comprehension is contingent on both oral language comprehension and word-level reading ability, skills that are thought to be intrinsically related in the early school years. However, while previous studies examining bidirectional relationships among oral vocabulary and reading development have generally found an association between word…

Oral language proficiency in kindergarten can facilitate the acquisition of reading and writing. However, in diglossic languages, like Arabic, the large gap between the spoken and the formal, modern standard (MSA) varieties of the language may restrict the benefits of oral language proficiency to subsequent literacy skills. Here, we tested, in a…