The Acquisition of Acoustic Cues to Onset and Coda Voicing Contrasts by Preschoolers With Hearing Loss

Purpose Children with hearing loss (HL), including those with hearing aids (HAs) and cochlear implants (CIs), often have difficulties contrasting words like “ b each ” versus “ p each ” and “ do g ” versus “ do ck ” due to challenges producing systematic voicing contrasts. Even when acoustic contrasts are present, these may not be perceived as such by others. This can cause miscommunication, leading to poor self-esteem and social isolation. Acoustic evidence is therefore needed to determine if these children have established distinct voicing categories before entering school and if misperceptions are due to a lack of phonological representations or due to a still-maturing implementation system. The findings should help inform more effective early intervention. Method Participants included 14 children with HL (eight HA users, five CI users, and one bimodal) and 20 with normal hearing, all English-speaking preschoolers. In an elicited imitation task, they produced consonant–vowel–consonant minimal pair words that contrasted voicing in word-initial (onset) or word-final (coda) position at all three places of articulation (PoAs). Results Overall, children with HL showed acoustically distinct voicing categories for both onsets and codas at all three PoAs. Contrasts were less systematic for codas than for onsets, as also confirmed by adults' perceptual ratings. Conclusions Preschoolers with HL produce acoustic differences for voiced versus voiceless onsets and codas, indicating distinct phonological representations for both. Nonetheless, codas were less accurately perceived by adult raters, especially when produced by CI users. This suggests a protracted development of the phonetic implementation of codas, where CI users, in particular, may benefit from targeted intervention.

ELICITED IMITATION TASKS AS A MEASURE OF L2 PROFICIENCY

Elicited imitation tasks (EITs) have been proposed and examined as a practical measure of second language (L2) proficiency. This study aimed to provide an updated and comprehensive view of the relationship between EITs and other proficiency measures. Toward that end, 46 reports were retrieved contributing 60 independent effect sizes (Pearson’s r) that were weighted and averaged. Several EIT features were also examined as potential moderators. The results portray EIT as a generally consistent measure of L2 proficiency (r = .66). Among other moderators, EIT stimuli length was positively associated with stronger correlations. Overall, the findings provide support for the use of EITs as a means to greater consistency and practicality in measuring L2 proficiency. In our Discussion section, we highlight the need for more transparent reporting and provide empirically grounded recommendations for EIT design and for further research into EIT development.

ELICITED IMITATION AS A MEASURE OF L2 PROFICIENCY

Elicited imitation (EI), a short-cut measure of global proficiency in second language (L2) research, requires participants to listen to sentences and repeat them as closely as possible. To support instrument sharing and assessment of L2 proficiency for longitudinal and crosslinguistic research, we created a parallel form of an EI task (EIT) for L2 English originally developed by the third author and colleagues and investigated the reliability and validity of the original and new forms. Eighty-two participants completed the two EITs, an oral narrative task, and a self-diagnostic survey. Both forms exhibited high reliability and good alignment with external criterion measures. Both distinguished well among four proficiency levels in the sample. Further, participants’ perception of EI difficulty aligned well with their EI scores. We suggest some improvements to boost forms equivalence and discuss new insights about the nature of EI as reconstructive, integrative, modality independent, and with indirect links to communicative abilities. Our study seeks to make this English EIT instrument widely useful to the L2 research community.

MEASUREMENT PROPERTIES OF A STANDARDIZED ELICITED IMITATION TEST: AN INTEGRATIVE DATA ANALYSIS

Elicited Imitation Tests (EITs) are commonly used in second language acquisition (SLA)/bilingualism research contexts to assess the general oral proficiency of study participants. While previous studies have provided valuable EIT construct-related validity evidence, some key gaps remain. This study uses an integrative data analysis to further probe the validity of the Korean EIT score interpretations by examining the performances of 318 Korean learners (198 second language, 79 foreign language, and 41 heritage) on the Korean EIT scored by five different raters. Expanding on previous EIT validation efforts, this study (a) examined both inter-rater reliability and differences in rater severity, (b) explored measurement bias across subpopulations of language learners, (c) identified relevant linguistic features which relate to item difficulty, and (d) provided a norm-referenced interpretation for Korean EIT scores. Overall, findings suggest that the Korean EIT can be used in diverse SLA/bilingualism research contexts, as it measures ability similarly across subgroups and raters.

The importance of increased processing demands in the design of Elicited Imitation tests

This study is a conceptual replication of Ellis’ ‘Measuring implicit and explicit knowledge of a second language: A psychometric study’, published in Studies in Second Language Acquisition (2005), aiming to establish the importance of including belief statements (hypothesized to increase processing demands) in the design of Elicited Imitation (EI) tests. In a between-groups comparison, 103 participants completed one of two versions of Erlam’s EI test (2006), one which required participants to make a ‘belief’ judgement, and one which did not. Both contained ungrammatical stimuli. Participants were scored for repetition of grammatical stimuli and correction of ungrammatical stimuli. An Exit questionnaire aimed to establish how aware they were of ungrammatical stimuli. Participants also completed a timed grammaticality judgement test (TGJT), an untimed grammaticality judgement test (UGJT), a metalinguistic knowledge test (MKT), and another Elicited Imitation (EI) test designed as a measure of global proficiency. Performance on each EI version was examined in relationship to performance on these measures. There was no variation between performance on either EI test version. The article underscores the need for ongoing research investigating design features of EI tests.

THE ASSOCIATIONS BETWEEN IMPLICIT AND EXPLICIT LANGUAGE APTITUDE AND THE EFFECTS OF THE TIMING OF CORRECTIVE FEEDBACK

This study examines the associations between implicit and explicit language aptitude and the effects of the timing of corrective feedback (CF). A total of 112 seventh-grade EFL learners were assigned to three groups: Immediate CF, Delayed CF, and Task Only. The three groups underwent three treatment sessions during which they performed six focused communicative tasks eliciting the use of the English past tense. The Immediate and Delayed CF groups received CF treatments in the first and final sessions, respectively, and the Task Only group performed the communicative tasks without receiving any feedback. Treatment effects were measured through an untimed grammaticality judgment test and an elicited imitation test. Implicit language aptitude was operationalized as procedural memory and explicit language aptitude as working memory and declarative memory. Multiple regression analysis showed that procedural memory was significantly predictive of the effectiveness of Immediate CF, declarative memory was significantly associated with Delayed CF and Task Only, and working memory was a significant predictor of Immediate CF and Delayed CF. The results were interpreted by consulting the methodological features of the treatments and the mechanisms of the three cognitive abilities.

Language Usage and Second Language Morphosyntax: Effects of Availability, Reliability, and Formulaicity

A large body of psycholinguistic research demonstrates that both language processing and language acquisition are sensitive to the distributions of linguistic constructions in usage. Here we investigate how statistical distributions at different linguistic levels – morphological and lexical (Experiments 1 and 2), and phrasal (Experiment 2) – contribute to the ease with which morphosyntax is processed and produced by second language learners. We analyze Chinese ESL learners’ knowledge of four English inflectional morphemes: -ed, -ing, and third-person -s on verbs, and plural -s on nouns. In Elicited Imitation Tasks, participants listened to length- and difficulty-matched sentences each containing one target morpheme and typed the whole sentence as accurately as they could after a short delay. Experiment 1 investigated lexical and morphemic levels, testing the hypotheses that a morpheme is expected to be more easily processed when it is (1) highly available (i.e., occurring in frequent word-forms), and (2) highly reliable (i.e., occurring in lemma words that are consistently conjugated in the form containing this morpheme). Thirty sentences were made for each morpheme, divided into three Availability-Reliability Distribution (ARD) groups on the basis of corpus analysis in the Corpus of Contemporary American English (COCA; Davies, 2008-): 10 target words high in availability, 10 high in reliability, and 10 low in both reliability and availability. Responses were scored on whether the target morpheme was accurately reproduced given the provision of the correct lemma. A generalized linear mixed-effects logit model (GLMM) revealed fixed effects of morpheme type, availability, and reliability on the accuracy of morpheme provision. There were no effects of lemma frequency. Experiment 2 successfully replicated these results and extended the investigation to explore phrasal formulaicity by manipulating the frequency of the four-word strings in which the morpheme was embedded. GLMMs replicated the effects of word-form availability and reliability and additionally revealed independent phrase-superiority effects where morphemes were better reproduced in contexts of higher string-frequency. Taken together, these findings demonstrate that morpheme acquisition reflects the distributional properties of learners’ experience and the mappings therein between lexis, morphology, phraseology, and semantics. These conclusions support an emergentist view of the statistical symbolic learning of morphology where language acquisition involves the satisfaction of competing constraints across multiple grain-sizes of units.