Acoustic signal processing from a dichotic experiment

• Autor(a) principal: Scliar-Cabral, Leonor
• Data de Publicação: 2022
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Confluência
• Texto Completo: https://revistaconfluencia.org.br/rc/article/view/522
• topic: Experimento dicótico; processamento; sinal acústico da fala; alfabetização; mecanismos atencionais.; Dichotic experiment; processing; speech acoustic signal; early literacy; attentional mechanisms

Speech acoustic signal processing in minimal dichotic listening simultaneous pairs is discussed, differing only in the first occlusive segment, in CV bisyllabic paroxytones, to verify the early literacy effect. Methodology: Twenty-nine children with a mean age of 7.3 or 7.4 years old, belonging to two medium-high (NSEM) and low (NSEB) socioeconomic levels participated: at the Elementary School 1st year end, early literate NSEM ten and NSEB eight children and at the 1st year beginning, only illiterate NSEB eleven. Results: although there were no significant differences in the number of correct answers, intrusions and blendings, between the early literate and illiterate, the answers differ in terms of the two populations strategies. Early literacy influences greater consistency in strategies based on duration, while those of the illiterate are random, or diffuse. The distinctive phonetic features that compose the phoneme bundle processing is confirmed.