The research report describes the ability of Kazakh preschool children to tell narratives relating to mental states, and the connection with theory of mind tasks about false beliefs. Three groups of preschool children (N = 29; 3-, 4-, and 5- year-olds) from the city of Almaty were tested in the Kazakh language. The results show very high…

While it has been shown that socioeconomic status (SES) is important for children's literacy development in their first language (L1), less is known about its association with reading in a second language (L2). The present study examined the different effects of SES on the acquisition of reading in Chinese as L1 and English as L2 from ages 7 to…

Widespread use of the Modern Language Aptitude Test (MLAT) in L2 studies of individual differences implicitly assumes that L2 aptitude is a distinct cognitive facet. There is considerable evidence for prediction from L1 abilities to L2 learning. In this longitudinal study, L1-MLAT-L2 relations were examined in 307 US secondary students based on…

This study examined how Papiamento and Dutch attitude and home literacy environment of 168 children in fourth grade of the post-colonial Dutch Caribbean, predicted L1 and L2 reading literacy in sixth grade. Overall, children had higher scores for reading literacy in L1 Papiamento as compared with L2 Dutch. They showed more positive attitudes…

To address the evidence gap in making effective language of instruction (LOI) decisions, we propose a systematic review of the role of LOI choices in education programs and policies on literacy outcomes in multilingual educational contexts in low- and middle-income countries (LMICs). Grounded in a multidisciplinary theory of change (ToC)…

The dissertation focuses on the Chinese literacy experiences of different generations of Thai Chinese families in Thailand, spanning periods characterized by varying ideologies toward the Chinese language, which have either constrained or facilitated its acquisition. This qualitative work examines how evolving national policies and international…

This study examined the crosslinguistic sharing of morphological awareness (MA) in biliteracy development. The analysis included 34 correlational studies with 41 independent samples (N = 4,104). Correlational coefficients were meta-analyzed, yielding four main findings: (a) the correlation between first language (L1) and second language (L2) MA…

This systematic review aims to synthesize the literature on the effects of cross-linguistic transfer on Spanish/English bilinguals' reading comprehension skills. The search yielded at least 90 studies in which participants were Spanish/English bilinguals aged birth to Grade 12. Researchers assessed participants' decoding and/or linguistic…

Measuring learning outcomes on core skills is key to building evidence on which teaching and learning interventions are most effective, and ultimately informing policy that prioritises these skills, amongst early learners. However, developing national or systems-level assessments pose considerable challenges, including implementing an effective…

This study investigates the links between the second-generation Chinese Australians' heritage language proficiency and perceptions of Chinese identity. Thirty 10--11-year-old children of Chinese immigrants took a Chinese proficiency test and participated in semi-structured interviews. The test revealed a wide range of performance levels in all the…

Research has established the link between socioeconomic status (SES) and children's reading development. However, the theoretical mechanisms underlying the association between them have yet to be fully understood. Moreover, few previous studies exploring the mechanisms tapped both first language (L1) and second language (L2) at the same time. In…

This paper examines evidence for relationships among individual differences (IDs) in L1 achievement, L2 aptitude, and L2 achievement. It begins by providing an overview of my academic journey from L1 educator to L2 researcher and explains the development of the Linguistic Coding Differences Hypothesis (LCDH). Next, I review Peter Skehan's…

Recently, research in second language acquisition has seen an increased attention on low-educated low-literate (LESLLA) learners. However, few of the existing instruments to measure L2 proficiency have been validated for use with this population. In this paper, we examine how adult L2 learners with diverging educational backgrounds perform on and…

Primary school children develop literacy practices in various domains and situations in everyday life. This study focused on the analysis of literacy practices of children aged 8-12 years from the perspective of their families. 1,843 families participated in the non-experimental explanatory study. The children in these families speak Spanish as a…

We examined the relation of morphological awareness with language and literacy skills, namely phonological awareness, orthographic awareness, vocabulary, word reading, spelling, text reading fluency, and reading comprehension. We also examined potential moderators of the relations (grade level, orthographic depth of language, receptive vs.…