Rise time and formant transition duration in the discrimination of speech sounds: the Ba-Wa distinction in developmental dyslexia

2010 ◽  
Vol 14 (1) ◽  
pp. 34-43 ◽  
Author(s):  
Usha Goswami ◽  
Tim Fosker ◽  
Martina Huss ◽  
Natasha Mead ◽  
Dénes Szűcs
1979 ◽  
Vol 22 (1) ◽  
pp. 147-165 ◽  
Author(s):  
James Hillenbrand ◽  
Fred D. Minifie ◽  
Thomas J. Edwards

Six- to seven-month-old infants were tested on their ability to discriminate among three speech sounds which differed on the basis of formant-transition duration, a major cue to distinctions among stop, semivowel and diphthong classes. The three speech sounds, [bε], [wε], and [uε] were produced in two different ways. The stimuli for one experiment were two-formant synthetic tokens which differed in formant-transition duration. The stimuli for a second experiment were produced with a computer-modification technique which artificially shortened or lengthened the formant-transition portion of a naturally produced [wɛ], resulting in tokens of [bɛ] and [uɛ]. The discrimination procedure involved visual reinforcement of a head-turn response following a change from a repeating background stimulus to a contrasting stimulus. Infants in both experiments discriminated [bɛ] from both [wɛ] and [uɛ]; evidence for [wε]-[uɛ] discrimination was obtained for the “computer modified” tokens only. These findings are discussed in terms of possible mechanisms underlying speech perception in infancy.


Cortex ◽  
2011 ◽  
Vol 47 (6) ◽  
pp. 674-689 ◽  
Author(s):  
Martina Huss ◽  
John P. Verney ◽  
Tim Fosker ◽  
Natasha Mead ◽  
Usha Goswami

2010 ◽  
Vol 48 (10) ◽  
pp. 3057-3061 ◽  
Author(s):  
A. Coez ◽  
P. Belin ◽  
E. Bizaguet ◽  
E. Ferrary ◽  
M. Zilbovicius ◽  
...  

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