INVESTIGATING SECOND LANGUAGE SPEECH: INTRODUCTION

* Faculty member of the Department of Foreign Language and Literature, and of the English Post-Graduation Program at the Federal University of Santa Catarina. She is a research fellow of the National Council for Scientiic and Technological Development (CNPq). Her teaching and research interests involve the development and teaching of L2 speech. Currently she is also the coordinator of the Letras Undergradute Program. E-mail: rosanesilveira@hotmail.com.

Over the last 15 years, the ield of second/foreign (L2) language pronunciation has witnessed an increase in research dedicated to its acquisition, particularly involving the perception and production of speech, and the efects of teaching on the development of these two important aspects of phonological knowledge.As a sign of the interest devoted to the ield, the previous decade has seen a surge in related publications, including the organization of handbooks of pronunciation (e.g., Kang, homson, & Murphy, 2017;Reed & Levis, 2015), special journal issues (e.g., Cardoso & Troimovich, 2015 -see also this collection), and the birth of a journal dedicated exclusively to L2 pronunciation (John Benjamin's Journal of Second Language Pronunciation, edited by John Levis). he current issue of Ilha do Desterro aims to contribute to the ield by providing new empirical data and analyses involving a wide range of irst and second languages, topics, research methods, and learning/teaching contexts.It includes topics involving speech perception and production (see forthcoming discussions), application and testing of theories and models of L2 speech development and phonological representations (e.g., Vieira; John & Cardoso), acquisition of L2 phonology and phonotactics (e.g., John & Cardoso; Luchini), multilingualism (Preuss & Rodrigues; Rafat), pronunciation teaching and its efects on learning (including Voice-Onset Time -VOT, segments, syllable structures, stress and spoken lexis -e.g., Alves & Luchini; Kivistö-de Souza, Carlet, Jułkowska, & Rato), teacher cognition and training on pronunciation (e.g., Buss), and sociolinguistic and psycholinguistic aspects of L2 speech learning (these include the studies by Cornwell; Alvez & Luchini, respectively).
he conceptualization and planning of this issue coincided with the 2016 International Symposium on the Acquisition of Second Language Speech (New Sounds; organized by Ocke-Schwen Bohn at Aarhus University in Denmark), an event founded by Allan James and Jonathan Leather, in 1990.Due to this coincidence and the shared interests and goals of New Sounds, a call for papers for this thematic issue on L2 speech was publicized ater the event and shared across all New Sounds members from over 50 countries.his collection thus constitutes a snapshot of recent developments in the ield and research being conducted by L2 phonologists across the globe.he international scope of this issue is relected in unique data collected and/or analyzed in eight diferent countries (Argentina, Brazil, Canada, Italy, Portugal, Spain, United Kingdom, and United States), from a variety of language perspectives: nine diferent irst/native languages (Catalan, Dutch, English, Farsi, Haitian Creole, Brazilian/European Portuguese, Russian, Spanish and some language combinations in multilingual contexts such as Farsi-English, English-Portuguese and Portuguese-Spanish) and four target L2s (English, French, Portuguese, and Spanish).In addition, the selected articles comprise a wide variety of L2 learning settings, such as multilingual/bilingual he target learning features range from lowerlevel phonetic features, such as VOT (Alves & Luchini; Kupske), vowels (Correa & Ferreira-Gonçalves; Kivistöde Souza; Lima Jr.; Souza), and consonants (Silva; Cornwell; Rafat), and higher-level suprasegmental features including syllables (John & Cardoso), nuclear stress (Luchini), and the spoken lexis (Vieira).Some articles, however, extrapolate the conines of speciicity and examine the personality or identity traits that afect the acquisition of L2 speech (Cornwell; Zárate-Sández).Finally, many articles emphasize the pedagogical implications and applications of research in L2 speech perception and/or production (Alves & Luchini; Buss; Luchini; Vieira).
his volume can roughly be divided into three main sections based on their general focus.While most articles focus exclusively on speech production (Correa & Ferreira-Gonçalves; Cornwell; Lima Jr.; Luchini; John & Cardoso; Kupske; Preuss & Rodrigues; Rafat; Zárate-Sández), a handful of articles examine L2 phenomena from the perspective of perception (Kivistö-de Souza; Silva), or both perception and production (Alves & Luchini).his general distributional pattern dictated the main organization of the articles in this thematic issue.We summarize below the articles included in this collection of studies examining L2 speech, organized in order of appearance, according to the criteria described: 1. Efects of Perceptual Training on the Identiication and Production of Word-initial Voiceless Stops by Argentinean Learners of English; by Ubiratã Kickhöfel Alves & Pedro Luis Luchini.In this study, Alves and Luchini investigate the efectiveness of perceptual training on the perception and production of VOT in word-initial voiceless stops in English.heir study gathered data from 24 Argentinean, Spanishspeaking participants, who were stratiied among two experimental groups and a control.hey were asked to engage in perception training via the manipulation of two variables: perceptual training alone, perceptual training plus explicit instruction.hey were then tested using a consonant identiication task (for perception) and a read-aloud activity (for production).heir results show a signiicant increase in perception by the two experimental groups that received perceptual training on VOT, while for production, only the group that received explicit instruction improved over the treatment period and posttests.
2. Vowel inventory size matters Assessing cueweighting in L2 vowel perception; by Hanna Kivistö-de Souza, Angélica Carlet, Izabela Anna Jułkowska, and Anabela Rato.In this experimental study, Kivistöde Souza et al. examine whether the inventory size of vowels in the L1 can contribute to the use of temporal cues in L2 vowel perception.hey assessed the perception of English vowels /i-ɪ/ by L1 speakers of Danish, Portuguese, Catalan, and Russian performing a forced-choice identiication task containing natural and duration-manipulated stimuli.heir results show that the participants' over-reliance on duration cues partially relate to their L1 vowel inventory size.In other words, the participants with the largest L1 vowel inventory (Danish) demonstrate the most native-like vowel perception while those with the smallest L1 vowel inventory (Russian) over-rely on duration cues more than the other learners.Interestingly, the participants with somewhat comparable L1 vowel inventories (Portuguese and Catalan) perform similarly.
3. Portuguese language learning by Haitian immigrants: he perception of the liquid consonants /l/ and /ɾ/; by Susiele Machry da Silva.his article by Silva investigates the perceptual development of /l/ and /ɾ/ in intervocalic contexts by a group of Haitians who have recently immigrated to Brazil.Following insights from Flege (1995) and Best and Tyler (2007), the author hypothesizes that these segments would be relatively diicult to acquire because they would be categorized as a single unit by their Haitian Creole speaking participants, due to the phonotactics of their L1 and to how these segments are transferred into the L2.Findings conirm the author's prediction and, in addition, they reveal that exposure to the target Brazilian Portuguese (measured in terms of length of residence and class attendance) had positive efects on their perception of non-native /l/ and /ɾ/ in L2 Portuguese.
4. Bilingual speech production: evaluating linguistic similarity, language switching costs and attentional system; by Elena Ortiz Preuss and Taiany Braz Rodrigues.Turning now to studies targeting speech production, the research conducted by Preuss and Rodrigues analyzed similarity and switching cost efects on two experimental tasks (attentional network and picture-naming) by a group of Portuguese-English and Portuguese-Spanish bilinguals, within the language-switching paradigm.he results reveal that, in within-subjects comparisons, the signiicant diferences observed signal an asymmetrical cost of language switch.hese indings corroborate the authors' hypothesis that linguistic similarity efects could inluence learners' production in attentional network and picture-naming tasks.

5.
A complex approach on integrated late bilinguals' English VOT production: a study on south Brazilian immigrants in London; by Felipe Flores Kupske.
Another study that focuses exclusively on learners' production is that by Kupske, who investigates the correlation between length of residence (LOR) of a group of Brazilian immigrants in London and their production of VOT in L2 English.Adopting a complex perspective to language analysis, and via comparisons of the acoustic nature of native versus non-native VOT patterns, the indings indicate that the participants' VOT values for English are positively correlated with their LOR, suggesting that the neuroplasticity and the cognitive mechanisms for language development remain intact during the lifespan of immigrants who do not speak the language of the host country.
6. Interdental fricative production in Dutch heritage language speakers in Canada; by Sarah Cornwell and Yasaman Rafat.Cornwell and Rafat's study also examines a group of immigrants (Dutch) and how their willingness to display their L1 identity is relected in their oral production of the interdentals in L2 English in Canada.Adopting a mix of naturalistic and reading tasks, the results conirm the authors' hypothesis that the Dutch participants would manipulate their production of interdentals to sound L1-like so that they could, subconsciously, express their Dutch cultural identity.
7. he inluence of metalinguistic knowledge of segmental phonology on the production of English vowels by Brazilian undergraduate students; by Ronaldo Mangueira Lima Jr. he study by Lima Jr. examines the efects of explicit metalinguistic instruction of segmental phonology on the production of three pairs of vowels that are highly confusing for Brazilians: /i ~ ɪ/, /ɛ ~ ae/ and /u ~ ʊ/, which tend to be produced as their prototypical L1 counterparts /i/, /ɛ/, and /u/ respectively.his time, the focus is on in-training EFL teachers who signiicantly improved in their ability to produce these vowels ater instruction that emphasized the development of metalinguistic awareness for vowels.he discussion of the results of this longitudinal study, based on spectral quality analyses of speech samples, highlights the importance of providing future language teachers with metalinguistic information on the production of vowels.

Acquisition of French nasal vowels [ɛ], [ã] and
[ɔ] by Brazilian learners: articulatory aspects; by Bruna Teixeira Correa, Giovana Ferreira-Gonçalves, and Mirian Rose Brum-de-Paula.his study focuses on the articulation of French vowels that pose diiculties to Brazilian learners of French. he study compares articulatory data of vowels produced by two Brazilian learners of French from diferent proiciency levels, a native speaker of French, and a native speaker of Brazilian Portuguese.Ultrasonographic images were used to describe the tongue movements of each group when producing nasal and oral vowels; the results show that target-like tongue gestures for producing the French vowels were observed for the more proicient Brazilian learner of French.9. Geminate attrition across three generations of Farsi-English bilinguals living in Canada: An acoustic Study, by Yasaman Rafat, Mercedeh Mohaghegh, and Ryan Stevenson.he production of geminate-singleton consonants is investigated in this article, which is concerned with language attrition in the speech of Farsi-English speaking bilinguals residing in Canada.hree generations of Farsi immigrants provided data for the study.Important independent variables in the study were bilinguals' age of arrival in Canada, and the efects of manner of articulation and voicing. he data were collected with a word-naming task and the target consonants were acoustically analyzed.he study found evidence of geminate-singleton attrition across the three generations of bilinguals, and attributes this attrition to universal phonetic principles.
10. On syllable structure and phonological variation: he case of i-epenthesis, by Brazilian Portuguese learners of English, by Walcir Cardoso and Paul John. he authors investigate oral production data by relying on nonword-learning tasks completed by Brazilian learners of English.heir goal is twofold: to discuss syllabiication in word-medial and inal positions, and to investigate the source of L2 phonological variation.he study focuses on /p/ and /k/ codas to test the hypothesis that L2 variation in coda production is lexical rather than derivational, given that L2 lexical items may have dual underlying representations and either of them may be retrieved for speech production. he results corroborate this hypothesis and the authors make a case for the existence of dual representations for single lexical items in L2 speech.
11. Measurement for Accentedness, Pause Frequency/Duration and Nuclear Stress Placement in the EFL Classroom, by Pedro Luis Luchini. he goal of this study is to examine the efects of diferent types of pronunciation teaching on a number of phonological features by Argentinean learners of English. he author compares the production of two groups who received diferent types of pronunciation instruction: controlled exercises and awareness-raising about phonological forms.Raters analyzed the data and attributed rates for four dependent variables: accentedness, frequency and duration of pauses, and nuclear stress placement.he results suggest that, for all measures of pronunciation knowledge included in the study, awareness-raising instruction is more efective than the controlled exercises.
12. he Role of Training in Shaping Pre-Service Teacher Cognition Related to L2 Pronunciation, by Larissa Buss.his classroom-based study investigates teachers' cognition regarding L2 pronunciation teaching.he author uses questionnaires and interviews to gather information from undergraduate students enrolled in two diferent Teaching English as a Second Language programs in Canada.Her results show that the group of students who attended a course focusing on phonology and pronunciation teaching developed a positive view of pronunciation teaching, improved their level of conidence for the teaching of pronunciation, and sharpened their awareness about their own pronunciation.
13. Reexamining L2 Accent: How Much Can Personality Explain, by Germán Zárate-Sández.his study investigates the role a non-linguistic variable, personality, in L2 accent.he talkers were Englishspeaking learners of Spanish who provided Spanish production data while completing an image description task. he productions were rated for degree of L2 accent by three expert raters.Five dimensions of personality were measured: openness to experience, conscientiousness, extroversion, agreeableness, and neuroticism.he results indicate a signiicant negative correlation between neuroticism (i.e., anxiety) and L2 accent, and a positive signiicant correlation between extroversion and L2 accent.
14. Lexical Access in L2 Speech Production: A controlled Serial Search Task, by Gicele Vergine Vieira.Based on a correlational analysis, the author uses measures of working memory capacity and L2 proiciency to predict bilingual lexical access by a group of Brazilian learners of English from varied proiciency levels.he lexical access measure consists of a picturenaming task. he author observed better performance on the picture-naming task by learners with higher working memory.She explains this behavior by alleging that more proicient leaners possess more automatized L2 knowledge, and thus have suicient attentional resources to retrieve lexical items.
Finally, the issue brings a review of the book Second Language Acquisition (Slabakova, 2016), written by Alessandra Anastasi.

A bit of history and dedication
In the context of this thematic issue, we would like to recognize the importance of a Brazilian research group to the dissemination of studies related to L2 speech: he Núcleo de Fonética e Fonologia Aplicada à Língua Estrangeira (NUPFFALE).Since its inception in1999, irst under the guidance of Professor Barbara Oughton Baptista, and currently under the coordination of Dr. Rosane Silveira, this group has produced many relevant publications in the ield (e.g., Baptista, Koerich, & Rauber, 2006;Baptista, Koerich, & Silveira, 2008;Zimmer, Alves, & Silveira, 2009;Rauber, Watkins, Silveira, & Koerich, 2010).his group is associated with the Graduate English Program of the Federal University of Santa Catarina (Brazil), which hosts the prestigious Ilha do Desterro, a Journal of English Language, Literatures in English and Cultural Studies.
NUPFFALE was responsible for the revival of New Sounds, which had remained dormant from 2000 through 2007 due to the retirement of its creators, Allan James and Jonathan Leather.hanks to this initiative, L2 speech researchers continue to have the opportunity to share their work in a major international event entirely devoted to the ield.his thematic issue is dedicated to the institutions, organizers, researchers and personnel who have made the eight editions of New Sounds possible: