This article surveys the development of second language acquisition research in the area of tense and aspect. Research in the area has grown from the incidental investigation of tense-aspect morphology as part of the morpheme-order studies to investigations of the construction of interlanguage temporal semantics. Going beyond verbal morphology, many studies investigate a full range of temporal expression, including the use of pragmatic and lexical means. Much recent research also draws on theories of inherent, or lexical, aspect. An emphasis on the relation of form and meaning characterizes both the form-oriented approach and the semantic-oriented approach, the competing research paradigms that currently guide our work. The increase in scholarly activity in this domain of second language acquisition, as reflected not only in the number of studies undertaken but in the number of target languages investigated, bodes well for the understanding of temporality in second language.

In this response to Ellis's target article on frequency in language processing, language use, and language acquisition, we argue in favor of a role for frequency in several areas of second language acquisition, including interactional input and output and speech processing. We also discuss areas where second language acquisition appears to proceed along its own route and at its own pace regardless of the frequency of the input, as well as areas where input is infrequent but acquisition appears to be unimpeded. Our response is intended to highlight the complexity of the task of deciphering the role and importance of frequency.

Theoretical claims about the benefits of corrective feedback have been largely premised on learners’ noticing of feedback (e.g., Gass & Mackey, 2006; Long, 1996; Schmidt, 1990, 1995; Swain, 1995), and findings have demonstrated that both the feedback target (Mackey, Gass, & McDonough, 2000) and the mode of provision (Lai & Zhao, 2006) can affect learners’ accurate perception of feedback. The current study extended this research by investigating learners’ perception and use of feedback provided in task-based interaction in both computer-mediated (CMC) and face-to-face (FTF) modes. Utilizing stimulated recall, the study examined if 24 intermediate-level learners of Spanish as a foreign language accurately noticed feedback as feedback, if they noticed the feedback target, and if the environment in which they interacted (CMC vs. FTF) made a difference in their accuracy. The study also investigated if modality affected opportunities for modified output immediately following feedback and if learners used those opportunities differently according to mode. Results demonstrated that, overall, learners did notice feedback as feedback in both modes. Contrary to expectations, there were no statistical differences between modes in feedback perception accuracy. Significant differences were found, however, in learners’ opportunities for and use of feedback depending on the interaction environment and the type of error being addressed.

This study examines the acquisition of the featural constraints on clitic and null distribution in Spanish among simultaneous and sequential Chinese-Spanish bilinguals from Peru. A truth value judgment task targeted the referential meaning of null objects in a negation context. Objects were elicited via two clitic elicitation tasks that targeted anaphoric contexts and left-dislocated topics. An acceptability task tested sensitivity to left-dislocated object drop. Although simultaneous bilinguals were mostly undistinguishable from monolinguals, the late learners differed from both of these groups across tasks. Age of arrival led to different outcomes, with late learners showing more deficits than the child learners. Late learners avoided using clitics and relied on lexical and null objects. Residual transfer effects were observed among the child learners in the form of insensitivity to the features that serve as the basis for null argument identification and clitic deficits in production. It is also argued that transfer persists despite early and intense exposure to the second language in a natural environment because of the existence of an unmarked argument identification option in the first language.

This study examines the role of environment in the development of pragmatic comprehension. It tracks two groups of Japanese students of English: 60 students in a college in Japan (English as a foreign language [EFL] learners) and 57 students in a college in the United States (English as a second language [ESL] learners). The learners completed a computerized listening task that measured their ability to comprehend two types of implied meaning: indirect refusals (k = 24) and indirect opinions (k = 24). The task was given to each group twice, before and after the students received approximately 120–130 hr of classroom instruction. Comprehension was analyzed for accuracy (scores) and speed (average time taken to answer each item correctly). Results showed that, in both learner groups, accuracy and comprehension speed improved significantly over time. For the EFL group, the magnitude of effect was much less for speed than for accuracy. In contrast, ESL learners showed significant improvement in comprehension speed, with a sizable effect size, but only marginal improvement in accuracy.

In this paper we address the need for replication studies in the field of second language acquisition and discuss the problems surrounding standards of reporting research. A particular focus is on the level of detail necessary for replication to take place. The lack of uniform standards is noted with specific examples of problematic reporting taken from descriptions of second language learners' proficiency levels and measures of linguistic accuracy in second language writing research. We propose ways that we believe will lead to more thorough reporting of research and that will therefore allow others to engage in replication.

In this article we argue against a definitional approach to oral proficiency and in favor of a principled approach based on sound theoretical considerations. We first identify four problematic frends in the oral proficiency movement as it is currently conceived: the tail wagging the dog, false authenticity, premature institutionalization, and the psychometric posture. Thereafter, we offer the rudiments of a principled theory of oral proficiency, based on the theory of higher forms of human cognitive activity developed by the Vygotskyan school of psycholinguistics. The theory compels us to bring into focus such factors as open systems, the individual speaker, functional systems, and intersubjectivity. From this perspective, we argue that if the construct of oral proficiency is to have any significance at all for language teaching and testing, researchers must come to understand what it means for real speakers (natives as well as nonnatives) to interact with other real speakers in the everyday world of human activity rather than in the world circumscribed by language tests.

This paper provides evidence from a study of ESL speakers that cross-language transfer effects interact, sometimes in very subtle ways, with developmental effects in the construction of L2 syllable structures. It extends Broselow and Finer's (1991) proposal for the Minimal Sonority Distance Parameter-Setting (MSD) model in L2 syllables by (a) adding evidence from a language that unambiguously exhibits transfer in complex onsets and (b) examining syllable codas to see whether the MSD parameter can be extended to account for the distribution of error patterns there, as well. The results of the study generally support the predictions that the MSD model makes for consonant cluster difficulty in specific syllable positions; however, it does not make predictions about the patterns that are found in learner error types. We argue that optimality theory (Prince & Smolensky, 1993) provides a more explicit account of the interactions between transfer and developmental effects in L2 syllables, allowing us to interpret within a singular grammatical framework not only why learners have difficulty with specific ESL structures but also how they resolve it.

Models of the second language acquisition process have not specifically elaborated on the nature of the learner's perception and processing of target language input, a process known as intake. They have typically failed to specify the mechanisms or variables involved in the intake process or to distinguish between the stages of processing input from perception, to comprehension, to assimilation into an interlanguage grammar. Research and theoretical models from L1 psycholinguistic literature have been neglected. Recent L1 and L2 research on language processing are compared, and experimental methods for eliciting data to confirm them are discussed.

Interaction research that has investigated the relationship between language production and second language (L2) development has largely focused on learners' immediate responses to interactional feedback. However, other speech production processes might help account for the beneficial relationship between interaction and L2 development. The current study examines whether syntactic priming—the tendency to produce a syntactic structure encountered in the recent discourse—is associated with English as a second language (ESL) question development. The participants were intermediate-level Thai learners of English (N = 46) at a large public university in northern Thailand. In two 20-min sessions, the participants carried out communicative activities with a more advanced L2 English interlocutor who had been scripted with developmentally advanced question forms. They also completed an oral pretest and two posttests that consisted of activities similar to those carried out during the treatment sessions. The results indicated that participants who evidenced high levels of syntactic priming were likely to advance to a higher stage in the developmental sequence of ESL question formation.

This review examines whether similarity between the first language (L1) and second language (L2) influences the (morpho)syntactic processing of the L2, using both neural location and temporal processing information. Results from functional magnetic resonance imaging (fMRI) and event-related potential (ERP) studies show that nonnative speakers can exhibit nativelike online L2 (morpho)syntactic processing behavior and neural patterns. These findings are contrary to predictions of the shallow structure hypothesis for syntactic processing (Clahsen & Felser, 2006a, 2006b). The data are in line with predictions of the (morpho)syntactic domain of the unified competition model of L2 acquisition (MacWhinney, 2005): Differences in L2 processing as compared to the L1 (or to native speakers of the L2) were generally associated with constructions that were crosslinguistically dissimilar or unique to the L2. The processing of crosslinguistically similar constructions generally produced no differences in brain activity between the L1 and L2. Overall, the available data suggest that cross-language similarity is an important factor that influences L2 (morpho)syntactic processing.

This experimental study compares the acquisition of the English to- and for-dative alternation by L1 English, L1 Japanese, and L1 Korean children. It is well known that there are restrictions on the verbs that can enter into the dative alternation—for example, you can show the results to someone and show someone the results; and you can demonstrate the results to someone but you cannot *demonstrate someone the results. L1 children sometimes overextend the double-object variant to verbs that disallow it. One question we investigate is whether L2 children, like L1 children, overextend the double-object variant. A second question we probe is whether L2 children, like L2 adults, transfer properties of the L1 grammar. Japanese disallows all double-accusative constructions. Korean disallows them with analogues of to-dative verbs; but with analogues of for-dative verbs, Korean productively allows them—more broadly, in fact, than English—if the benefactive verbal morpheme cwu- is added. Results from an oral grammaticality judgment task show (a) that all groups allow illicit to-dative double-object forms and (b) that the Japanese—but not the Koreans—allow illicit for-dative double-object forms. This bifurcation, we argue, stems from the fact that Korean (but not Japanese) has an overt morphological licensor for double objects. We thus find evidence of both (a) overgeneralization, like in L1 acquisition, and (b) L1 influence, like in adult L2 acquisition, in this case from the (syntactic) argument-changing properties of overt morphology.

Meta-analytic research suggests an edge of explicit over implicit instruction for the development of complex L2 grammatical structures, but the jury is still out as to which type of explicit instruction—deductive or inductive, where rules are respectively provided or elicited—proves more effective. Avoiding this dichotomy, accumulating research shows superior results for guided induction, in which teachers help learners co-construct rules by directing their attention to relevant aspects in the input and asking guiding questions. However, no study has jointly investigated the effects of guided induction on both learning outcomes and processes, or whether guided induction can prove effective outside classroom settings where teacher mediation is not possible. In this study, which targeted the complex Spanish gustar structures, 70 English-speaking learners of beginning Spanish received either guided induction via a videogame, deductive instruction in a traditional classroom setting, or no instruction. Learning outcomes were measured via one receptive and two controlled production tasks (oral and written) with old and new items. Results revealed that while both instruction groups improved across time, outperforming the control group, the guided induction group achieved higher learning outcomes on all productive posttests (except immediate oral production) and experienced greater retention. Additionally, the think-aloud protocols of the guided induction group revealed high levels of awareness of the L2 structure and a conspicuous activation of recently learned knowledge, which are posited to have contributed to this group’s superior performance. These findings thus illustrate, quantitatively and qualitatively, the potential of guided induction for the development of complex L2 grammar in online learning environments.

This paper investigates the nature of input available to learners in the institutional setting of the academic advising session. The advisory session, an unequal status encounter that by nature is a private speech event and cannot be observed by other learners, provides a starting point for the investigation of real and perceived availability of input. Evidence for the realization of speech acts as well as appropriate content and form, positive evidence from peers and status unequals, the effect of stereotypes, and limitations of a learner's pragmatic and grammatical competence are factors that may influence the course of development of interlanguage pragmatics in the institutional setting.

A number of studies on the acquisition of tense and aspect by learners of a second language point to the hypothesis that narrative structure influences the distribution of tense/aspect forms in interlanguage. However, the studies have reported conflicting profiles of tense/aspect use. This study suggests that much of the variation that has been previously reported stems from the level of proficiency of the learners. This crosssectional study examines 37 written and oral narrative pairs produced in a film retell task by adult learners of English as a second language. The analysis approaches the texts from two perspectives, from the perspective of acquisition, taking narrative structure (specifically grounding) as an environment for acquisition of tense/aspect, and from the perspective of the narrative itself, characterizing the foreground and background by the tense/aspect forms used. The study finds a developmental pattern in the distribution of tense/aspect morphology with respect to narrative structure. These results permit the assimilation of earlier findings into a developmental sequence in the acquisition of the tense/aspect system.

This study investigates the effects of meaningful input- and output-based practice on SLA. First-semester Spanish students (n = 45) were assigned to processing instruction, meaningful output-based instruction, or control groups. Experimental groups received the same input in instruction but received meaningful practice that was input or output based. Both experimental groups showed significant gains on immediate and delayed interpretation and production tasks. Repeated-measures analyses of variance showed that overall, for interpretation, both experimental groups outperformed the control group. For production, only the meaningful output-based group outperformed the control group. These results suggest that not only input-based but also output-based instruction can lead to linguistic development.We thank Ron Leow, Alison Mackey, and Cristina Sanz for their continual support and valuable input throughout the various phases of this research and for their comments on earlier versions of this manuscript. Likewise, we express our gratitude to Bill VanPatten and the various anonymous reviewers for their comments on the manuscript. We also thank the Linguistics Department for the use of its laboratory and equipment during data collection and Ru San Chen for assistance with statistical analyses. Special thanks to Gorky Cruz and Cristina Sanz for the use of digital photographs. Any errors or omissions are ours alone.

The present study brings together methods of extensive reading studies and eye-movement research to track the cognitive effects of exposure frequency on vocabulary processing and learning. Forty-two advanced second language learners of English read a stage 1 graded reader, Goodbye Mr. Hollywood, on a computer screen while their eye movements were recorded. The eye-tracking task was followed by comprehension questions and vocabulary posttests. Target vocabulary consisted of 20 pseudo words and 20 known words with a range of repetition from 1 to 30. Eye-movement data showed that readers spent more time on pseudo words than on familiar words and that fixation times decreased across encounters with more attention given to target words on early encounters. Repeated exposure supported form recognition but was not as significant for meaning recall and recognition. Total times spent on each encounter was positively associated with learning success in all vocabulary measures. The amount of attention, as reflected in total reading times on each pseudo word, positively predicted learning outcomes above and beyond the number of encounters. Results of the study add a cognitive dimension to the concept of engagement in lexical learning in the process of incidental learning from second language reading.

To what extent do second language (L2) learners benefit from instruction that includes corrective feedback (CF) on L2 speech perception? This article addresses this question by reporting the results of a classroom-based experimental study conducted with 32 young adult Korean learners of English. An instruction-only group and an instruction + CF group were exposed to five 1-hr form-focused lessons that drew learners’ attention to the nonnative phonemic contrast /i/-/ɪ/, but only the instruction + CF group was given relevant feedback. Forced-choice identification tasks were completed by participants in a pretest, an immediate posttest, and a delayed posttest. The two groups showed similar accuracy on the pretest; however, the instruction + CF group outperformed the instruction-only group on the immediate and delayed posttests as well as on unfamiliar words. The significant predictors for these differences turned out to be perceptual accuracy vis-à-vis /ɪ/-natural and /ɪ/-synthesized sounds. These findings are discussed in terms of the pivotal role played by CF in developing accuracy in L2 speech perception.

This paper reports the results of a study of the intonation of 18 Mandarin Chinese speakers lecturing in English. As a basis for the study, it is proposed that intonation be considered a grammar of cohesion in English discourse: Drawing from the intonational model of Pierrehumbert and Hirschberg (1990), it is argued that discrete morphemes of intonation correspond to the categories of cohesion in Halliday and Hasan's (1976) typology. The study investigated the hypothesis that the nonnative speakers who were able to use the intonation system of English most effectively would score higher on a global language test. Using a Computerized Speech Lab to measure pitch, four aspects of intonation were averaged for each speaker: (a) the pitch difference between newly introduced content words and function words, (b) the use of high pitch at phrase boundaries to link related constituents, (c) the use of pitch to distinguish contrasting items from given items, and (d) the paratone or increase in pitch range at rhetorical junctures to signal topic shift. These four measures were chosen for their contribution to the cohesion of the lectures. Multiple regression analysis indicates that the fourth intonation variable, the paratone, was a significant predictor of these subjects' English test scores. Examples are given of the other variables in context from both low- and high-scoring speakers. It is emphasized that intonation is not only a stylistic component of accent but also a meaning-bearing grammatical system.

Researchers have claimed that recasts might be ambiguous as feedback. Because recasts serve a dual function, as both feedback and conversational response, learners might not always interpret them as feedback (e.g., Lyster & Ranta, 1997). This study explores how learners interpret recasts they notice (as responses to content, negative evidence, positive evidence, or a combination of negative and positive evidence) and how recast features (linguistic targets, length, number of changes) might affect their interpretations. Forty-nine learners of Japanese engaged in task-based activities during which they received recasts of morphosyntactic and lexical errors. When learners noticed recasts, they occasionally interpreted them as responses to content, particularly when recasts were long and substantially different from their problematic utterances. In contrast, learners were significantly more likely to attend to the linguistic evidence in recasts when these were short and closely resembled the original utterances. These patterns were generally observed for both morphosyntactic and lexical recasts. Results suggest that length and number of changes might, in part, determine the explicitness of recasts as feedback and thus affect learners' abilities to interpret them as such.I am grateful to Alison Mackey, Helen Carpenter, and Ana-Maria Nuevo for their insightful suggestions on an earlier version of this article. I also would like to thank Alison Mackey, Ronald Leow, and Noriko Iwashita for their valuable feedback on the dissertation research on which this study is based, the anonymous SSLA reviewers for their thoughtful suggestions, and Brian Marx for his statistical advice. Any errors, of course, are my own. This research was supported in part by a dissertation improvement grant from the National Science Foundation (grant No. 0214188).