Desempenho de crianças normais em testes temporais auditivos em campo livre

Abstract

Background: auditory temporal processing. Aim: to determine the performance profile of normal hearing children in temporal sequence and order detection and identification tasks in free-field. Method: forty three children with ages raging from 7 to 11 years and 5 months were evaluated in two behavioral tests -frequency patterns test (FPT) and duration patterns test (DPT) -child's version by Auditec. Both tests were applied at 60 dBNA in free-field. Children were requested to provide two types of answers: nonverbal (NV) being murmuring for FPT and manual for DPT, and verbal (V), nomination for TPF and TPD. For both tests (FPT and DPT), ten repetitions of six sequence patterns totalizing 60 stimuli were presented to each child. Results: the performance on FPT with a non-verbal response was significantly better when compared to V response for all of the subjects. Significant performance improvements with age were observed in VFPT, NVDPT and VDPT. The performance on FPT was better than the performance on PDT. The results of this study showed similar performance on temporal sequence and order detection and identification tasks when compared to other studies conducted with Brazilian population in which these tasks were applied with supra-aural earphones. Conclusion: the values obtained for FPT and DPT can be considered the parameter of normal performance for Auditec's child version in free-field for children with ages between 7 to 11 years and 5 month. Key Words: Hearing; Auditory Perception; Children. ResumoTema: processamento temporal auditivo. Objetivo: determinar o perfil de desempenho de crianças com audição normal nas tarefas de detecção e identificação da ordem e seqüência temporal em campo livre. Método: avaliou-se 43 crianças com idade entre 7 anos e 11 anos e 5 meses em dois testes comportamentais -Teste de Padrões de Freqüência (TPF) e Teste de Padrões de Duração (TPD) -versão infantil da Auditec. Os testes foram aplicados em campo livre a 60 dBNA. Foram solicitados dois tipos de respostas: não verbal (NV) sendo o murmúrio para o TPF e manual para o TPD, e verbal (V), nomeação pra TPF e TPD. Para ambos os testes (TPF e TPD) foram apresentadas 10 repetições dos 6 padrões seqüenciais, totalizando 60 estímulos para cada criança. Resultados: o desempenho no TPF com resposta NV foi significativamente superior à resposta V para todos os sujeitos. Constatou-se melhora significativa do desempenho com a idade para o TPFV, TPDNV e TPDV. O desempenho no TPF foi superior ao TPD. Os resultados deste estudo demonstraram semelhante desempenho nas tarefas de detecção e identificação da ordem e seqüência temporal quando comparados com outros estudos realizados na população brasileira, nos quais estas tarefas foram aplicadas com fones supra-aurais. Conclusão: os valores obtidos para o TPF e TPD podem ser considerados como referência de normalidade para a versão infantil da Auditec em campo livre em crianças de 7 anos a 11 anos e 5 meses.

Processamento temporal de crianças com transtorno fonológico submetidas ao treino auditivo: estudo piloto

“…Taking into account the comparison of the normal range between the PPS and DPS tests (26) , it can be concluded that Portuguese-speaking children have better performance in the PPS test. This might be why even the performance of the C group was also heterogeneous; these findings corroborate the results of another study (27) . In general, the responses of the children in the FT and IT groups in the three CAP evaluations (1, 2 and 3) were very heterogeneous.…”

Habilidade de ordenação temporal e nível de especificidade nos diferentes testes tonais

“…In an integrative literature review on FPT and Long Latency Auditory Evoked Potential (19) , concerning its applicability to evaluate temporal ordering, we observed that, of the 29 studied papers, FPT was applied in all studies, but in only six of them, we applied DPT for evaluating the temporal ordering (20)(21)(22)(23)(24)(25) . It is supposed that over 60% of the evaluators apply FPT and less frequently DPT.…”

Variables in P300 recording: task type and electrode position

“…when you are mentally counting) which can be easily checked by the researcher to ask the task of "raising the index finger" when the individual hears the infrequent stimulus, linking the motor act to the appearance of infrequent stimulus. The task with a verbal response is more complex, indicating a need for learning or neuromaturation of the nervous system (28) . Still according to the author (22) , naming, a linguistic activity, demands dependent processes of complex connections of thinking with the language (28) .…”

“…The task with a verbal response is more complex, indicating a need for learning or neuromaturation of the nervous system (28) . Still according to the author (22) , naming, a linguistic activity, demands dependent processes of complex connections of thinking with the language (28) . The mean values of P300 latencies are higher for verbal than non-verbal stimuli and, conversely, the mean amplitudes are lower for verbal than non-vebal stimuli (22) .…”