Cours 05

Acoustic input vs. phonological representationWhat you hear:ry o: h o: m i m i g a a tt e ry o: h o: d e o t o o k i k uGoal: recover string of phonemic symbolsProblems:• Segmentation• Categorization• High vowels are devoiced in Japanese when between voiceless obstruentsKazanina et al. (2006): perception ofphonemic versus allophonic contrastsVery similar patterns at the phonetic surface in Russian and Korean:Kazanina et al. (2006): perception ofphonemic versus allophonic contrastsHowever, different surface distributions:»Kazanina et al. (2006): perception ofphonemic versus allophonic contrastsAnd different underlying ( lexical) representations However, different surface distributions:Kazanina et al. (2006): perception ofphonemic versus allophonic contrastsIn other words (picture):phonemic contrastallophonic contrast/T/ [d] in between voiced sounds[t] elsewhereExperiment• Russian and Korean participants• stimuli: [ta]-[da] continuum– one for each language, constructed from a naturalrecording of [ta] by a native speaker• tasks:– Russians: identification– Koreans: naturalness rating– all: AX discriminationResultsidentification /ratingResultsidentification /ratingdiscriminationExperiment• MEG recordings during passive listening• oddball paradigm(AAAABAAAABAAAABAA…)• two conditions:– linguistic (da vs. ta)– non-linguistic (1 vs. 1.2 kHz tones)Magnetoencephalography (MEG)• a non-invasive neurophysiological ...