Can native Japanese listeners learn to differentiate /r–l/ on the basis of F3 onset frequency?

• ERIN M. INGVALSON ^[1] ; LORI L. HOLT ^[1] ; JAMES L. McCLELLAND ^[2]
  1. [1] Carnegie Mellon University

     Carnegie Mellon University

     City of Pittsburgh, Estados Unidos

     
  2. [2] Stanford University

     Stanford University

     Estados Unidos

     
• Localización: Bilingualism: Language and cognition, ISSN 1366-7289, Vol. 15, Nº 2, 2012, págs. 255-274
• Idioma: inglés
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• Resumen

  • Many attempts have been made to teach native Japanese listeners to perceptually differentiate English /r–l/ (e.g. rock–lock). Though improvement is evident, in no case is final performance native English-like. We focused our training on the third formant onset frequency, shown to be the most reliable indicator of /r–l/ category membership. We first presented listeners with instances of synthetic /r–l/ stimuli varying only in F3 onset frequency, in a forced-choice identification training task with feedback. Evidence of learning was limited. The second experiment utilized an adaptive paradigm beginning with non-speech stimuli consisting only of /r/ and /l/ F3 frequency trajectories progressing to synthetic speech instances of /ra–la/; half of the trainees received feedback. Improvement was shown by some listeners, suggesting some enhancement of /r–l/ identification is possible following training with only F3 onset frequency. However, only a subset of these listeners showed signs of generalization of the training effect beyond the trained synthetic context.