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Moving Cross-Language Transfer from Hypothesis to Causal Evidence: Effects of First-Language reading Skills on Second-Language reading Development in Ghana.

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Bibliographic Details
Title:	Moving Cross-Language Transfer from Hypothesis to Causal Evidence: Effects of First-Language reading Skills on Second-Language reading Development in Ghana.
Authors:	Moussa, Wael¹ (AUTHOR), Lee, Jeongmin² (AUTHOR) jlee77@worldbank.org
Source:	American Educational Research Journal. Jun2026, Vol. 63 Issue 3, p544-574. 31p.
Subject Terms:	Language transfer (Language learning), Reading, Second language acquisition, Language policy, Bilingual education, Fluency (Language learning), Ghanaians, Instrumental variables (Statistics)
Geographic Terms:	Ghana
Abstract:	In multilingual countries, debates about language policy in education persist. Many countries adopt a transitional bilingual approach in which children are taught to read in their first language (L1) as a subject before instruction shifts to an official language (L2) such as English. This model rests on the premise that L1 mastery aids L2 learning. Yet, most supporting evidence is correlational. We used an instrumental variable design to examine the causal effects of children's L1 reading proficiency on L2 reading development with data from 4,352 children aged 5–13 years in Ghana. Results showed that L1 reading proficiency positively impacts basic L2 skills such as letter–sound recognition, but the effect diminishes for decoding pseudowords and becomes nonsignificant for reading fluency, suggesting inconsistent cross-language transfer. [ABSTRACT FROM AUTHOR]
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Database:	Education Research Complete

Description
Abstract:	In multilingual countries, debates about language policy in education persist. Many countries adopt a transitional bilingual approach in which children are taught to read in their first language (L1) as a subject before instruction shifts to an official language (L2) such as English. This model rests on the premise that L1 mastery aids L2 learning. Yet, most supporting evidence is correlational. We used an instrumental variable design to examine the causal effects of children's L1 reading proficiency on L2 reading development with data from 4,352 children aged 5–13 years in Ghana. Results showed that L1 reading proficiency positively impacts basic L2 skills such as letter–sound recognition, but the effect diminishes for decoding pseudowords and becomes nonsignificant for reading fluency, suggesting inconsistent cross-language transfer. [ABSTRACT FROM AUTHOR]
ISSN:	00028312
DOI:	10.3102/00028312261416515