This study investigated the relation between Dual Language Learners' (N = 90) vocabulary and grammar comprehension and word learning processes in preschool (aged 3-through-5 years). Of interest was whether: (a) performance in Spanish correlated with performance in English within each domain; and (b) comprehension predicted novel word learning…

This study investigated the relation between Dual Language Learners' (N = 90) vocabulary and grammar comprehension and word learning processes in preschool (aged 3-through-5 years). Of interest was whether: (1) performance in Spanish correlated with performance in English within each domain; and (2) comprehension predicted novel word learning…

The current study investigates Spanish children's variation between the standard and non-standard forms for second person singular preterit --s ("caiste" [approximately equal to] "caístes"). All second person singular preterit forms were extracted from the spontaneous speech of 78 children in Spain and analyzed for the effects…

Verbal morphology has been identified as a particularly vulnerable domain for adult heritage speakers (HSs) of Spanish, especially when it involves the selection of subjunctive mood. A minimal amount is known, however, about the potential effects of the variability associated with these forms on the acquisition of related epiphenomena, such as the…

The present study investigates to what extent first-language (L1) and second-language (L2) speakers use lexical futures, whether such forms provide evidence of development, and whether these forms are constrained differently from the present indicative (PI) according to linguistic predictors. It uses a combined approach through its…

In the L2 fluency literature there is considerable debate over how best to operationally define pauses and how different pause measures relate to L2 proficiency. This creates a challenge for researchers interested in L2 fluency, and particularly those who are working with groups that vary in L2 proficiency. This article addresses these issues by…

A close relationship between children's vocabulary size and the grammatical complexity of their speech is well attested but not well understood. The present study used latent change score modeling to examine the dynamic relationships between vocabulary and grammar growth within and across languages in longitudinal data from 90 simultaneous…

This study analyzed eTandem video-conferencing exchanges between five pairs of university students of English as a foreign language (EFL) and Spanish as a foreign language (SFL). The exchanges, which involved discussion of seven tasks, took place on a weekly basis. Drawing on an interactionist perspective (Ellis et al., 2001a; Loewen, 2005), the…

This dissertation explored whether unnecessary linguistic complexity (LC) in mathematics and biology assessment items changes the direction and significance of differential item functioning (DIF) between subgroups emergent bilinguals (EBs) and English proficient students (EPs). Due to inconsistencies in measuring LC in items, Study One adapted a…

Hundreds of millions of language learners around the globe study a second language with popular apps such as Duolingo, Rosetta Stone, Busuu, and Babbel. This study examined the effectiveness of one app, Babbel, for developing both receptive linguistic knowledge of vocabulary and grammar, as well as oral communicative ability in Spanish as a second…

The present study examines both properties of the language and properties of the learner to better understand variability at the earliest stages of second language (L2) acquisition. We used event-related potentials, an oral production task, and a battery of individual differences measures to examine the processing of number and gender agreement in…

Purpose: This study examined the nature of the relation between language-specific vocabulary and conceptual lexical-semantic skills with grammatical abilities within and across languages in preschool Latino dual language learners (DLLs). Method: Sixty-one typically developing, Spanish-English speaking DLLs from preschools serving low-income…

Cross-linguistically, monolingual children produce target-like inflected verbs much earlier than they can reliably distinguish between singular and plural subject-verb agreement morphology in comprehension (i.e. Johnson, V., J. de Villiers, and H. Seymour. 2005. "Agreement Without Understanding? The Case of Third Person Singular /s/."…

Although bilingual individuals know 2 languages, research suggests that the languages are not separate in the mind. This is especially evident when a bilingual individual switches languages midsentence, indicating that mental representations are, to some degree, overlapping or integrated across the 2 languages. In 2 eye-tracking experiments, we…

This study compares Spanish instructors' use of preterite and imperfect in the foreign language classroom to the distribution of these forms in large-scale corpora, which represent the input learners would potentially receive in a naturalistic learning context. Twenty-four 50-minute class sessions were recorded, and all tokens of preterite and…