Bilingualism changes language and literacy development, with morphological awareness and vocabulary as fundamental skills. This study tested whether experience with Chinese, which primarily uses compounds and lacks affixes, creates distinct pathways for acquiring English compound and affix awareness, thereby shaping their associations with English vocabulary. We tested Chinese-English-bilingual and English-monolingual preschoolers (N = 202, 3-to-5-year-olds) and built two path models. Model 1 included bilinguals and revealed that English affix awareness was primarily explained by cumulative English exposure (% English-input) and associated with vocabulary, while English compound awareness was predicted by Chinese compound proficiency and unrelated to vocabulary. Model 2 compared between groups, revealing significant associations between English vocabulary and both types of morphological awareness for monolinguals, whereas bilinguals only showed significance for affix awareness. Findings suggest that Chinese-English-bilingual and English-monolingual children show distinct morphological development patterns. Importantly, awareness of affixes, a rare feature in Chinese, is crucial for Chinese-English-bilinguals’ English vocabulary.

Morphological awareness, i.e., the ability to consciously manipulate roots (e.g., HEALTH) and affixes (e.g., -Y as in HEALTHY), is a key skill for literacy development. While its role is well documented from Grade 3 onward, its early contribution to reading and spelling acquisition remains unclear, especially in French. This study investigates whether morphological awareness predicts early reading and spelling, particularly for derived and inconsistent words, from Grade 1. We used an accelerated longitudinal design with two cohorts of French-speaking children (N = 291): one from Grade 1 to 2 and the other from Grade 2 to 3. An autoregressive structural equation model (SEM) was used to examine the predictive role of morphological awareness on later literacy outcomes, controlling for phonological skills, vocabulary, and non-verbal reasoning. Morphological awareness significantly predicted general reading and spelling abilities, and specifically the spelling of derived words, but not their reading. These effects were stronger in the younger cohort (Grade 1 to 2) due to the lesser effect of the autoregressive path. Morphological awareness plays a unique role in early literacy, particularly in spelling morphologically complex words. Findings are discussed in light of French orthographic consistency and current models of literacy acquisition.

This meta-analysis aimed to determine whether Chinese-English bilingual children with reading difficulties (RD) have significant deficits in morphological awareness (MA), phonological awareness, and word reading, in both their first and second languages (L1 and L2). It also evaluated the influence of RD severity, age, diglossia context, and methodological design on effect sizes. The study included 29 samples (N = 4,516) from 14 studies on children with RD in L1 morphosyllabic Chinese and L2 morphophonemic English. Results showed medium effect sizes for MA (g = −0.722) and PA (g = −0.625), and a large effect size for word reading (g = −2.042) in L1 Chinese. In L2 English, medium to large effect sizes were found for MA (g = −1.083), PA (g = −0.857), and word reading (g = −0.730). Age was the only significant moderator, with larger deficits observed as age increased. These findings align with studies on monolinguals with dyslexia and bilinguals with normal abilities or disabilities, recommending MA tasks in assessments.

Cross-linguistic interactions are the hallmark of bilingual development. Theoretical perspectives highlight the key role of cross-linguistic distances and language structure in literacy development. Despite the strong theoretical assumptions, the impact of such bilingualism factors in heritage-language speakers remains elusive given high variability in children's heritage-language experiences. A longitudinal inquiry of heritage-language learners of structurally distinct languages – Spanish–English and Chinese–English bilinguals (N = 181, Mage = 7.57, measured 1.5 years apart) aimed to fill this gap. Spanish–English bilinguals showed stronger associations between morphological awareness skills across their two languages, across time, likely reflecting cross-linguistic similarities in vocabulary and lexical morphology between Spanish and English. Chinese–English bilinguals, however, showed stronger associations between morphological and word reading skills in English, likely reflecting the critical role of morphology in spoken and written Chinese word structure. The findings inform theories of literacy by uncovering the mechanisms by which bilingualism factors influence child literacy development.

The awareness of words’ morphological structure has been thought to allow generalizing meaning to other, similarly constructed words. Conversely, a large vocabulary is thought to facilitate the recognition of words’ morphological regularities, thereby contributing to morphological awareness. For this reason, morphological awareness and vocabulary have been suggested to be reciprocally associated across development. We followed 242 (girls = 119) Norwegian preschoolers (Mage = 5.5 years) from preschool through Grade 2 and examined the cross-lagged relations between morphological awareness (inflections and derivations) and vocabulary (receptive and expressive). Our results confirm that the traditional cross-lagged panel model shows significant cross-lagged relations between morphological awareness and vocabulary, as previous studies have shown. However, no cross-lagged relations were found when we accounted for longitudinal measured stability through a cross-lagged panel model with lag-2 paths or unmeasured stability through the random intercept cross-lagged panel model. We found that approximately 50% of the variation in morphology and vocabulary was due to highly stable and invariant factors across grades. We discuss how the significant cross-lagged relations found in previous studies could have been due to their not accounting for the right type of stability when using longitudinal panel data.

The purpose of this study was to examine the early growth of morphological awareness and its predictors. We followed 172 English-speaking Canadian children (82 girls, 90 boys, Mage = 75.56 months at the first assessment point) from Grade 1 to Grade 3 and assessed them on nonverbal IQ, phonological short-term memory, phonological awareness, letter knowledge, and vocabulary at the beginning of Grade 1 and on morphological awareness at the end of Grade 1, beginning and end of Grade 2, and beginning of Grade 3. Results of growth curve modeling showed different growth patterns for Word Analogy and Sentence Analogy. In addition, vocabulary and phonological awareness were associated with the initial status of morphological awareness, and phonological awareness and letter knowledge predicted the growth rate of morphological awareness. These findings suggest that code-related skills drive the development of morphological awareness during the early years of literacy instruction.

Words’ morphemic structure and their orthographic representations vary across languages. How do bilingual experiences with structurally distinct languages influence children's morphological processes for word reading? Focusing on English literacy in monolinguals and bilinguals (N = 350, ages 5–9), we first revealed unique contributions of derivational (friend-li-est) and compound (girl-friend) morphology to early word reading. We then examined mechanisms of bilingual transfer in matched samples of Spanish–English and Chinese–English dual first language learners. Results revealed a principled cross-linguistic interaction between language group (Spanish vs. Chinese bilinguals) and type of morphological awareness. Specifically, bilinguals’ proficiency with the type of morphology that was less characteristic of their home language explained greater variance in their English literacy. These findings showcase the powerful effects of bilingualism on word reading processes in children who have similar reading proficiency but different language experiences, thereby advancing theoretical perspectives on literacy across diverse learners.

We know a great deal about children’s first steps into reading. Here, we explore how they become more sophisticated readers, learning to read complex words. Theoretical accounts predict that one key factor is morphological awareness, or awareness of the minimal units of meaning in language. And yet empirical studies have yet to clarify whether morphological awareness has a stronger relation to the development of reading skill for words with multiple morphemes in particular (i.e., morphological decoding) or to the reading of a whole range of words. We examined this question in this study by contrasting the role of morphological awareness in the development of morphological decoding and of broader word reading skill. Participants were 197 English-speaking children who were followed from Grade 3 to 4. We conducted longitudinal analyses that included stringent autoregressive controls to capture the determinants of gains over time, as well as controls for vocabulary and phonological awareness. Structural equation modeling (SEM) path analysis with this set of controls revealed that morphological awareness predicted significant unique gains in morphological decoding from Grade 3 to 4 with no such unique contributions to broader word reading skill. These findings clarify the role of morphological awareness in supporting children in developing the ability to read morphologically complex words, supporting a more targeted role for morphology in theories of word reading development.

Morphological awareness contributes to vocabulary acquisition and reading in bilingual children who learned English after their native language. In line with these considerations, we further investigated L2 processing in late adult bilinguals where questions related to morphology need to be clarified. French–English speakers (N = 92) were assessed for three morphological awareness stages: lexical semantic knowledge, syntactic knowledge, and distributive knowledge. We investigated whether the evolution of morphological awareness was related to L2 proficiency and whether it was facilitated by the presence of suffixes shared in L1 and L2. Our results confirmed the influence of language proficiency at each stage of morphological awareness. However, the hypothesis of an advantage of suffixes shared between French and English was not confirmed as no clear advantage was found for those suffixes. Our findings are discussed in line with the morphological congruence hypothesis and compared with the previous results in the literature.

This study examined the transfer facilitation effects from English morphological awareness on Chinese multicharacter word reading in English-speaking adult learners of Chinese as a foreign language (CFL). Fifty English-speaking American university CFL learners participated in our study who measured their English morphological awareness, Chinese morphological awareness, Chinese linguistic knowledge, Chinese word reading, and working memory. There were three major findings: (1) with approximately three years of formal Chinese instruction and limited Chinese print input, English-speaking adult learners of Chinese developed sensitivity to the internal morphological structure of multicharacter words in Chinese. (2) English morphological awareness did not directly contribute to Chinese bimorphemic three-character pseudoword reading yet contributed indirectly via the joint serial mediation by Chinese morphological awareness and Chinese monomorphemic two-character real word reading. (3) There was no additional influence from Chinese linguistic knowledge on Chinese word reading. And, English morphological awareness explained about 3.64% of the variance in second language Chinese bimorphemic three-character pseudoword reading. Discussion is provided regarding the transfer facilitation mechanism through which first language morphological awareness contributes to adult second language reading acquisition.

While most English words are multisyllabic, research on literacy acquisition has tended to focus on early acquisition of monosyllabic words. The processes involved in multisyllabic word reading and spelling in middle childhood are likely to differ from those in monosyllabic reading and spelling. The current paper examines the contributions of morphological awareness (MA; awareness of derivational morphemes), prosodic sensitivity (sensitivity to lexical stress), and phonological awareness (PA; awareness of phonemes) for multisyllabic word reading and spelling, after accounting for background variables (age, vocabulary, nonverbal IQ, short-term memory). Seventy 7–10-year-old children completed a battery of tasks. MA and prosodic sensitivity were independent predictors of multisyllabic reading, while MA and PA were independent predictors of multisyllabic spelling. These results contrast with previous research, which instead found that PA plays a more prominent role while prosodic sensitivity appears to demonstrate only an indirect influence. However, those studies largely examined reading of shorter, one to three syllable words. These findings indicate when words are longer and multisyllabic, prosodic sensitivity, PA, and MA have differing direct influences on literacy. MA and prosodic sensitivity relate to word reading, while MA and PA are important for spelling.

Word reading is a fundamental skill in reading and one of the building blocks of reading comprehension. Theories have posited that for second language (L2) learners, word reading skills are related if the children have sufficient experience in the L2 and are literate in the first language (L1). The L1 and L2 reading, phonological awareness skills, and morphological awareness skills of Syrian refugee children who speak Arabic and English were measured. These children were recent immigrants with limited L2 skills and varying levels of L1 education that was often not commensurate with their ages. Within- and across-language skills were examined in 96 children, ages 6 to 13 years. Results showed that phonological awareness and morphological awareness were strong within-language variables related to reading. Additionally, Arabic phonological awareness and morphological processing were strongly related to English word reading. Commonality analyses for variables within constructs (e.g., phonological awareness, morphological awareness) but across languages (Arabic and English) in relation to English word reading showed that in addition to unique variance contributed by the variables, there was a high degree of overlapping variance.

This study examined the within- and cross-language metalinguistic contribution of three components of metalinguistic awareness (i.e., phonological awareness, morphological awareness, and syntactic awareness) to reading comprehension in monolingual Chinese-speaking children from Mainland China (n = 190) and English–Chinese bilingual children from Singapore (n = 390). Moreover, the effect of home language use on the relationship between metalinguistic awareness and reading performance was investigated. For monolingual children, hierarchical regression analyses revealed that after partialing out the effects of age, nonverbal intelligence, and oral vocabulary, syntactic awareness uniquely predicted 7%–13% of the variance in reading comprehension measures, whereas this relationship was not observed between morphological awareness and reading comprehension. For the bilingual children, within-language regression analyses revealed that English/Chinese morphological awareness and syntactic awareness both contributed significantly to English/Chinese reading measures over and above vocabulary and phonological awareness. Cross-linguistically, structure equation modeling results demonstrated that the bilingual children’s English and Chinese metalinguistic awareness were closely related and jointly supported reading comprehension in both languages, thus lending support to Koda’s transfer facilitation model. Furthermore, home language use was found to contribute to the bilingual children’s reading proficiency via its impact on metalinguistic awareness. The paper concludes with a discussion of the policy and pedagogical implications that can be drawn from these findings.

We examined whether morphological awareness made a significant contribution to word-level reading across Grades 1 to 4. We test these relations specifically in a task measuring awareness of past-tense forms. A total of 375 children from Grades 1 to 4 completed tasks assessing past-tense morphological awareness along with real word and pseudoword reading. Children also completed control measures assessing phonological awareness, phonological short-term memory, sentence-level language skills, and nonverbal cognitive ability. After these controls, past-tense morphological awareness was a significant predictor of real word reading in Grades 1 and 2, but not in Grades 3 and 4. Further, following on all controls, past-tense morphological awareness was a consistent predictor of pseudoword reading across Grades 1 to 4. Morphological awareness, at least as measured with past-tense verbs, appears to have a role in word reading across the early to middle elementary school grades; for young readers, there are relations to reading of both known and novel words, and for older readers, relations are significant specifically in reading novel words. These findings are discussed within the context of theories of word reading development.

While the relationship between vocabulary, morphological awareness, and reading comprehension has been examined extensively, research on this relationship among adult second language learners has only been explored recently. The present study addresses this gap by examining how adult English as a foreign language learners developed different types of English vocabulary and morphological awareness over the course of one academic year. Participants included 523 college freshmen in Taiwan with varying reading proficiency levels. Results from a series of mixed-measure analyses of variance revealed that (a) even the more proficient college English as a foreign language learners failed to fully grasp morphological principles; (b) the gap in vocabulary between the less skilled readers, the average, and the skilled readers widened significantly over the course of one academic year; (c) the effect of phonological and orthographic changes involved in morphologically complex words differed for the assessment of base meaning, but did not vary across proficiency levels; (d) progress in different aspects of morphological awareness, such as interpreting the meaning of the suffix or identifying the base of a morphologically complex word, varied significantly among readers of different proficiency levels; and (e) suffixes of different parts of speech posed different challenges to learners. Theoretical and pedagogical implications of the findings are discussed.

We examined morphological awareness and reading achievement in university students in two ways. First, students with and without a self-reported history of reading difficulties were compared on word reading and text reading achievement, and on the reading-related skills of morphological awareness, orthographic processing, and phonological processing. Second, the unique contribution of morphological awareness to reading achievement was examined for a larger sample of first-year university students. Students with a self-reported history of reading difficulties (n = 54) showed moderate to large gaps in each area of reading achievement, and timed reading comprehension appeared more severely impaired than word-reading efficiency. These students had a deficit in morphological awareness that persisted even when (a) phonological awareness and orthographic processing skills, or (b) word-reading accuracy were statistically controlled. In the larger first-year sample (N = 211), morphological awareness contributed to variance in word reading beyond that accounted for by phonological awareness and orthographic processing. Furthermore, of the reading-related skills, only morphological awareness made a unique contribution to reading comprehension beyond variance accounted for by word reading. Taken together, these results demonstrate that morphological awareness makes unique contributions to university students’ reading achievement and is an additional difficulty for students with a self-reported history of reading difficulties.

The contribution of morphological awareness to reading comprehension in Hebrew was tested in 100 second- and third-grade students on three types of morphology: inflections, derivations, and construct formation, controlling for vocabulary knowledge. Third graders performed better than second graders on inflectional and construct formation awareness, but only derivations and construct formation predicted success in reading comprehension. Significant differences in reading comprehension but not in orthographic word recognition and phonological decoding were found between students with low and high morphological awareness. The results highlight the importance of examining the unique contribution of different components of morphological awareness to reading comprehension.

This cross-sectional study examined the development of morphological awareness in Greek children 4–7 years old. A distinction was adopted between epilinguistic control, evidenced in judgment tasks and indicative of elementary levels of awareness, and metalinguistic awareness, evidenced in production tasks and indicative of full-blown conscious awareness. The morphological domains of inflectional and derivational morphology were specifically contrasted to determine whether they follow distinct developmental trajectories. Trial-level performance data from 236 children in four morphological awareness tasks as a function of age were modeled using generalized additive models. Significant performance increase with age was found for all four awareness tasks. The results further indicated that production of derivational morphemes was consistently more difficult than production of inflectional morphemes and judgment of derivational morphemes, whereas the differences between the two inflectional and between the two judgment tasks were not significant. This suggests that at these ages, epilinguistic control is similarly effective for the two morphological domains whereas full metalinguistic awareness of derivational morphology trails behind that of inflectional morphology, at least as measured by these specific tasks. The findings highlight the need for early tracking and finer distinctions within the domain of morphological awareness, to identify and potentially enhance the critical skills related to the development of vocabulary and reading comprehension.

We investigated the unique effects of morphological awareness on several aspects of reading in Portuguese. We tested 132 Portuguese-speaking children in the fourth grade. Morphological awareness was assessed with a word analogy task that included inflectional and derivational transformations. Results indicated that morphological awareness was a significant predictor of word reading accuracy, word reading fluency, and reading comprehension after controlling for the effects of nonverbal ability and phonological awareness. Morphological awareness also explained unique variance in reading comprehension after adding word reading as a control. In conclusion, morphological awareness has important roles in both word reading and reading comprehension in Portuguese. Educational and clinical implications are discussed.