Learning to discriminate English / r / and / l / in adulthood : Behavioral and modeling studies

I describe a body of work undertaken to explore the effect of experience on the perception of speech sounds. The work is undertaken within the context of my overall theoretical perspective, in which language is viewed as reflecting the influence of graded rather than categorical constraints and in which experience gradually shapes the way we respond to the sounds we experience, including sounds in our native language and sounds in foreign languages. Focusing on the case of Japanese adults learning the contrast between English /r/ and /l/, I present a neural network simulation model that captures how experience shapes perception during native language exposure during childhood. I go on to describe predictions from the model about the effects of different training regimes on learning the English /r/-/l/ contrast after acquiring natural Japanese spoken language categories. Then, I present the results of several experiments, partially supporting the model’s predictions but also demonstrating some limitations Japanese adults face in learning the English /r/-/l/ contrast that are not fully captured by the model. Overall, the work suggests that perceptual change is possible in adulthood, with some limitations that remain to be addressed in future work.

[1]  Stephen A. Ritz,et al.  Distinctive features, categorical perception, and probability learning: some applications of a neural model , 1977 .

[2]  James L. McClelland,et al.  Success and failure of new speech category learning in adulthood: Consequences of learned Hebbian attractors in topographic maps , 2007, Cognitive, affective & behavioral neuroscience.

[3]  James L. McClelland,et al.  Teaching the /r/–/l/ discrimination to Japanese adults: behavioral and neural aspects , 2002, Physiology & Behavior.

[4]  Eytan Ruppin,et al.  Disorders of Brain, Behavior, and Cognition: The Neurocomputational Perspective , 1999 .

[5]  Randy L. Diehl,et al.  MAPPING THE TASK FOR THE SECOND LANGUAGE LEARNER: THE CASE OF JAPANESE ACQUISITION OF /R/ AND /L/ , 2004 .

[6]  P. Kuhl.  Human adults and human infants show a “perceptual magnet effect” for the prototypes of speech categories, monkeys do not , 1991, Perception & psychophysics.

[7]  James L. McClelland,et al.  Why there are complementary learning systems in the hippocampus and neocortex: insights from the successes and failures of connectionist models of learning and memory. , 1995, Psychological review.

[8]  James Emil Flege,et al.  THE EFFECT OF EXPERIENCE ON ADULTS' ACQUISITION OF A SECOND LANGUAGE , 2001, Studies in Second Language Acquisition.

[9]  James L. McClelland.  Capturing Gradience, Continuous Change, and Quasi‐Regularity in Sound, Word, Phrase, and Meaning , 2015 .

[10]  Jenifer Larson-Hall.  Weighing the benefits of studying a foreign language at a younger starting age in a minimal input situation , 2008 .

[11]  Paul Iverson,et al.  Phonetic training with acoustic cue manipulations: a comparison of methods for teaching English /r/-/l/ to Japanese adults. , 2005, The Journal of the Acoustical Society of America.

[12]  James L. McClelland,et al.  Success and failure in teaching the [r]-[l] contrast to Japanese adults: Tests of a Hebbian model of plasticity and stabilization in spoken language perception , 2002, Cognitive, affective & behavioral neuroscience.

[13]  W. Strange.  Speech perception and linguistic experience : issues in cross-language research , 1995 .

[14]  D. Pisoni,et al.  Training Japanese listeners to identify English /r/ and /l/: a first report. , 1991, The Journal of the Acoustical Society of America.

[15]  Virginia A. Mann,et al.  Distinguishing universal and language-dependent levels of speech perception: Evidence from Japanese listeners' perception of English “l” and “r” , 1986, Cognition.

[16]  Reiko Akahane-Yamada,et al.  Perception and production of syllable-initial English /r/ and /l/ by native speakers of Japanese , 1990, ICSLP.

[17]  E. Lenneberg.  Biological Foundations of Language , 1967 .

[18]  D. Pisoni,et al.  Training Japanese listeners to identify English /r/and /l/: Long-term retention of learning in perception and production , 1999, Perception & psychophysics.

[19]  James L. McClelland.  Running head : HEBBIAN LEARNING How Far Can You Go with Hebbian Learning , and When Does it Lead you Astray ? , 2005 .

[20]  Lori L. Holt,et al.  Learning Foreign Sounds in an Alien World: Videogame Training Improves Non-Native Speech Categorization , 2011, Cogn. Sci..

[21]  J. Flege.  Assessing constraints on second-language segmental production and perception , 2003 .

[22]  Lori L. Holt,et al.  Predicting native English-like performance by native Japanese speakers , 2011, J. Phonetics.

[23]  K. Jellinger.  Processes of Change in Brain and Cognitive Development Attention and Performance XXI , 2007 .

[24]  J. Flege.  Second Language Speech Learning Theory , Findings , and Problems , 2006 .

[25]  K. Stevens,et al.  Linguistic experience alters phonetic perception in infants by 6 months of age. , 1992, Science.

[26]  James L. McClelland,et al.  Can native Japanese listeners learn to differentiate /r–l/ on the basis of F3 onset frequency?* , 2011, Bilingualism: Language and Cognition.

[27]  James L. McClelland,et al.  Alternatives to the combinatorial paradigm of linguistic theory based on domain general principles of human cognition , 2005 .

[28]  C. Best,et al.  Nonnative and second-language speech perception : commonalities and complementarities , 2007 .

[29]  James L. McClelland,et al.  Understanding failures of learning: Hebbian learning, competition for representational space, and some preliminary experimental data. , 1999, Progress in brain research.

[30]  Joan L. Bybee,et al.  Gradience of Gradience: A reply to Jackendoff , 2007 .