Grammatical complexity has been established as a key indicator of language and writing development (Ortega 2003; Bulté and Housen, 2014; Crossley and McNamara 2014). The present study uses the Register-Functional approach to complexity (Biber et al. 2022) to compare the development of L1 English and L2 English writers across year of study and…

This article sheds light on the linguistic and extralinguistic conditions that determine the likelihood of L1 grammatical attrition in late sequential bilinguals. We explore whether aspectual interpretations associated with the present tense may be a vulnerable area for the native grammar of 30 late Spanish-English bilinguals who have settled in…

This study investigates the acquisition and maintenance of periphrastic and se-passives in second language (L2), heritage (HS), and (Spanish-dominant) native Spanish speakers (NS) by addressing: (i) How accessible are Spanish periphrastic passives (which also exist in English) and se-passives (unique to Spanish) for L2ers and HSs in production?…

Anxiety is an affective variable that impacts learning negatively by impeding cognitive progress. Anxiety is associated with learners' individual differences such as beliefs, attitudes, expectations, motivation, and emotions. It has been determined in many studies that anxiety affects language learning negatively and interferes with many types of…

Assessment of learners affects all processes of their learning. Generally, without assessment, it is very difficult to evaluate the effectiveness of the teaching and learning process. Understanding their weak points and difficulties in their writing would help teachers and administrators focus more on these areas. Therefore, this content analysis…

The present study examines the mechanisms of lexical case acquisition in Russian by two-to-five-year-old Russian monolingual (n = 54) and Russian-English bilingual children (n = 38). Participants performed a picture-based sentence completion task. Sentences were constructed to elicit production of real Russian words (n = 24) and nonce words (n =…

The effect of language aptitude on grammar attainment of second language learners with different ages of onset became one of the hot topics in the last decades. However, most previous studies were conducted in a second language context with inconsistent results, and few studies were conducted in a foreign language context. To fill this gap, the…

Literature on early language acquisition has observed that age of onset of acquisition (AoA) is relevant for certain grammatical phenomena. Simultaneous bilinguals receive regular and extensive exposure to two languages from birth (Müller, 2009), whereas sequential child learners get in extensive contact to L[subscript B] once the L[subscript A]…

Morphological variability in bilingual language production is widely attested. Producing inflected words has been found to be less reliable and consistent in bilinguals than in first-language (functionally monolingual) L1 speakers, even for bilingual speakers at advanced proficiency levels. The sources for these differences are not well…

Acquisition of natural language has been shown to fundamentally impact both one's ability to use the first language and the ability to learn subsequent languages later in life. Sign languages offer a unique perspective on this issue because Deaf signers receive access to signed input at varying ages. The majority acquires sign language in (early)…

This study investigates the influences of early and intense L2 exposure on children's L1 causative verb production, assessed by an experimental causative verb production task. Turkish expresses causality by morphological and lexical means, whereas English does so by periphrastic and lexical means. Learning L2 English might enhance L1 Turkish…

The goal of this study is to examine which word order is dominant in colloquial Buginese-Indonesian, 1) to find out which word-order pattern is more acceptable between SVO and VSO, 2) to find out which word-order pattern is more acceptable between VO and OV, and 3) to find out what internal linguistic characteristics and social factors motivate…

When linguistic input contains inconsistent use of grammatical forms, children produce these forms more consistently, a process called "regularization." Deaf children learning American Sign Language from parents who are non-native users of the language regularize their parents' inconsistent usages. In studies of artificial languages…

Montrul's (2008) onset age hypothesis predicts that, if attrition occurs in early bilingualism, it will be more severe in simultaneous than in sequential bilinguals. This study tested that prediction in an eye-tracking experiment focused on the processing of Spanish gender agreement during sentence reading. Heritage Spanish speakers exposed to…

This paper sets out to peruse the role of various theories or more precisely, hypotheses invoked in second language acquisition (SLA) research by surveying three empirical studies pertaining to the critical period hypothesis in the SLA of phonetics and phonology. In particular, the three studies reviewed are titled in chronological order as (1)…