This longitudinal study examined the process of English reading comprehension at age 11 for 173 low achieving Spanish-speaking children. The influence of growth rates, from early childhood (age 4.5) to pre-adolescence (age 11), in vocabulary and word reading skills on this complex process were evaluated using structural equation modeling. Standardized measures of word reading accuracy and productive vocabulary were administered annually, in English and Spanish, and English reading comprehension measures were administered at age 11. Latent growth curve analyses revealed that English skills accounted for all unique variance in English reading comprehension outcomes. Further, expected developmental shifts in the influence of word reading and vocabulary skills over time were not shown, likely on account of students’ below grade level reading comprehension achievement. This work underscores the need for theoretical models of comprehension to account for students’ skill profiles and abilities.

This longitudinal study modeled growth rates, from age 4.5 to 11, in English and Spanish oral language and word reading skills among 173 Spanish-speaking children from low-income households. Individual growth modeling was employed using scores from standardized measures of word reading, expressive vocabulary, and verbal short-term language memory. The trajectories demonstrate that students' rates of growth and overall ability in word reading were on par with national norms. In contrast, students' oral language skills started out below national norms and their rates of growth, although surpassing the national rates, were not sufficient to reach age-appropriate levels. The results underscore the need for increased and sustained attention to promoting this population's language development.

This longitudinal study examined growth in the English productive vocabularies of bilingual and monolingual children between ages 24 and 36 months and explored the utility and validity of supplementing parent reports with teacher reports to improve the estimation of children's vocabulary. Low-income, English-speaking and English/Spanish-speaking parents and Early Head Start and Head Start program teachers completed the MacArthur-Bates Communicative Development Inventory, Words and Sentences for 85 children. Results indicate faster growth rates for monolingual than for bilingual children and larger vocabularies for bilingual children who spoke mostly English than mostly Spanish at home. Parent-teacher composite reports, like parent reports, significantly related to children's directly assessed productive vocabulary at ages 30 and 36 months, but parent reports fit the model better. Implications for vocabulary assessment are discussed.

This longitudinal study examined the association between early patterns of home language use (age 4.5 years) and vocabulary growth (ages 4.5 to 12 years) in English and Spanish for 180 Spanish-speaking language minority leamers followed from ages 4.5 to 12 years. Standardized measures of vocabulary were administered to children from ages 4.5 to 12 years, and home language use was assessed via parent survey at study entry. Three predominant home language use pattems were identified: mostly Spanish, equal amounts of Spanish and English, and mostly English. Individual growth modeling results demonstrated initial English vocabulary differences between the three language groups, with the mostly English group outperforming the other two language groups. However, the rate of growth for the equal amounts and mostly Spanish groups surpassed that of the mostly English group; by age 12 years, the gaps among the 3 groups had narrowed, but participants' vocabulary skills remained below national norms. In contrast, students' pattems of Spanish vocabulary growth did not vary, resulting in parallel but widening gaps through age 12 years. Results suggest that early Spanish use in language minority leamers' homes, in and of itself, does not interfere with the development of English vocabulary. However, despite their English instructional context, all learners' vocabulary knowledge was below average and the gap compared with national norms persisted.

This study investigated the direct and indirect roles of morphological awareness reading comprehension for Spanish-speaking language minority learners reading in English. Multivariate path analysis was used to investigate the unique contribution of derivational morphological awareness to reading comprehension as well as its indirect contributions via three hypothesized mediators for students in sixth, seventh, and eighth grade (N = 101). Results indicated a significant unique contribution of morphological awareness, controlling for phonemic decoding, listening comprehension, reading vocabulary, word reading fluency, and passage reading fluency. Results further indicated significant indirect contributions of morphological awareness via reading vocabulary and passage fluency, but not via word reading fluency. Findings suggest that morphological awareness may play multiple important roles in second-language reading comprehension.