Artificial linguistic systems (ALSs) offer many potential benefits for second language acquisition (SLA) research. Nonetheless, their use in experiments with posttest-only designs can give rise to internal validity problems depending on the baseline that is employed to establish evidence of learning. Researchers in this area often compare…

This study considers the role of L1 phonological influence in L2 English past tense morphology production by native speakers of Spanish, Mandarin, and Japanese. While these L1s share similar phonological restrictions on consonant cluster formation needed for English past tense morphology, differences arise in L1 syntax (only Mandarin lacks…

Many studies on bilingual language processing have shown that lexical access is not selective with respect to language. These studies typically used nouns as word stimuli. The aim of the present study was to extend the previous findings on noun processing to verb processing. In the first experiment, Dutch-English bilinguals performed a lexical…

Tasks have received increased attention in SLA research for the past decade, as has the role of focus on form. However, few empirical studies have investigated the relationship among tasks, focus-on-form techniques, and second language (L2) learning outcomes. To help address this gap, the present study examined how the task variable +/- contextual…

This article investigates the information structure of verb-second (V2) declaratives in Swedish, German, and nonnative German. Even though almost any type of element can occur in the so-called prefield, the clause-initial preverbal position of V2 declaratives, we have found language-specific patterns in native-speaker corpora: The frequencies of…

Recasts have figured prominently in recent SLA research, with studies documenting significant advantages for learners exposed to this type of negative feedback. Although some researchers have suggested that such findings imply a beneficial role for negative evidence (i.e., information regarding the impossibility of certain utterances in the…

Examines the effects of simplified input in early second language (L2) acquisition of English by experimentally manipulating language input to two groups of learners and then assessing their acquisition longitudinally within a controlled laboratory setting. Findings reveal that the dual task of acquiring vocabulary and grammar does not hinder…

The present study addresses the reactivity of two types of verbal protocols in SLA research. It expands on the work of Leow and Morgan-Short (2004), who found nonmetalinguistic verbalization during a second-language reading task to be nonreactive for beginning learners' text comprehension, intake, and production of the targeted morphological form.…

To contribute to a better understanding of second language (L2) sentence processing, the present study examines how L2 learners parse temporarily ambiguous sentences containing relative clauses. Results are reported from both off-line and on-line experiments with three groups of advanced learners of Greek whose native languages (L1s) were Spanish,…

This paper investigates the effects of input and interaction as separate entities and in combination. We further investigate these effects as a function of different language areas. One hundred two learners of L2 Spanish were provided with input on (a) Spanish gender agreement (noun + adjective), (b) "estar" + location, and (c) seven vocabulary…

Four groups of second language (L2) learners of English from different language backgrounds (Chinese, Japanese, German, and Greek) and a group of native speaker controls participated in an online reading time experiment with sentences involving long-distance "wh"-dependencies. Although the native speakers showed evidence of making use of…

This paper reviews studies that have contrasted the effectiveness of structured-input instruction with output-based instruction. It then presents results from a study comparing the relative effects of structured-input and output-based instruction on students' ability to comprehend and produce direct object pronouns in second language French. Three…

This article reviews previous studies of the effects of implicit and explicit corrective feedback on SLA, pointing out a number of methodological problems. It then reports on a new study of the effects of these two types of corrective feedback on the acquisition of past tense -ed. In an experimental design (two experimental groups and a control…