Acquisition of L2 Japanese geminates: Training with waveform displays

Miki Motohashi-Saigo, Kansai Gaidai University Debra M. Hardison, Michigan State University The value of waveform display s as visual feedback was explored in a training study involving perception and production of L2 Japanese by beginning-level L1 English learners. A pretest-posttest design compared auditory-visual (AV) and auditory-only (Aonly) Web-based training. Stimuli were sin gleton and geminate /t ,k,s/ followed by /a,u/ in two conditions (isolated words, carrier sentences). Fillers with long vowels were included. Participants completed a forced-choice identification task involving minimal triplets: singletons, geminates, long vowels (e.g., sa su, sassu, saasu). Results revealed a) significant improvement in geminate identification following training, especially for AV; b) significant effect of geminate (lowest scores for /s/); c) no significant effect of condition; and d) no significant improvement for the control group. Most errors were misperceptions of geminates as long vowels. Test of generalization revealed 5% decline in accuracy for AV an d 14% for A-only. Geminate production improved significantly (especially for AV) based on rater judgments; improvement was greatest for /k/ and smallest for /s/. Most production errors involved substitution of a singleton for a geminate. Post-study interviews produced positive comments on Web-based training. Waveforms increased awareness of durational differences. Results support the effectiveness of auditory-visual input in L2 perception training with transfer to novel stimuli and improved production.

[1]  Peter Ladefoged,et al.  Phonetic Data Analysis: An Introduction to Fieldwork and Instrumental Techniques , 2003 .

[2]  D. Hardison.  Acquisition of second-language speech: Effects of visual cues, context, and talker variability , 2003, Applied Psycholinguistics.

[3]  Mieko S. Han,et al.  Acoustic manifestations of mora timing in Japanese , 1994 .

[4]  R. L. Hayes.  The perception of novel phoneme contrasts in a second language: a developmental study of native speakers of English learning Japanese singleton and geminate consonant contrasts , 2001 .

[5]  Natsuko Tsujimura,et al.  An Introduction to Japanese Linguistics , 1997 .

[6]  Dorothy M. Chun,et al.  12. Technologies for prosody in context: Past and future of L2 research and practice , 2008 .

[7]  Debra M. Hardison,et al.  Generalization of Computer Assisted Prosody Training: Quantitative and Qualitative Findings , 2004 .

[8]  Paul Boersma,et al.  Praat, a system for doing phonetics by computer , 2002 .

[9]  Stephen G Parker,et al.  Quantifying the sonority hierarchy , 2002 .

[10]  John M. Levis,et al.  Teaching Intonation in Discourse Using Speech Visualization Technology. , 2004 .

[11]  D. Pisoni,et al.  Training Japanese listeners to identify English /r/ and /l/. II: The role of phonetic environment and talker variability in learning new perceptual categories. , 1993, The Journal of the Acoustical Society of America.

[12]  D. Pisoni,et al.  Training Japanese listeners to identify English /r/ and /l/: IV. Some effects of perceptual learning on speech production. , 1997, The Journal of the Acoustical Society of America.

[13]  Anne Cutler,et al.  The comparative perspective on spoken-language processing , 1997, Speech Commun..

[14]  A. Cutler,et al.  Rhythmic categories in spoken-word recognition , 2002 .

[15]  Dorothy M. Chun.  Discourse Intonation in L2: From theory and research to practice , 2002 .

[16]  R. Port,et al.  Evidence for mora timing in Japanese. , 1987, The Journal of the Acoustical Society of America.

[17]  J. Blevins.  The Syllable in Phonological Theory , 1995 .

[18]  Bruce P. Hayes.  Compensatory Lengthening in Moraic Phonology , 1989 .

[19]  M. Han,et al.  The Timing Control of Geminate and Single Stop Consonants in Japanese: A Challenge for Nonnative Speakers , 1992, Phonetica.

[20]  Debra M. Hardison,et al.  Development of perception of second language Japanese geminates: Role of duration, sonority, and segmentation strategy , 2009, Applied Psycholinguistics.

[21]  Yuko Z. Yoshida.  Accents in Tokyo and Kyoto Japanese Vowel Quality in terms of Duration and Licensing Potency , 2006 .