Effects of Various Articulatory Features of Speech on Cortical Event-Related Potentials and Behavioral Measures of Speech-Sound Processing
Notice bibliographique
Résumé
In Brief Objective: To investigate the effects of three articulatory features of speech (i.e., vowel-space contrast, place of articulation of stop consonants, and voiced/voiceless distinctions) on cortical event-related potentials (ERPs) (waves N1, mismatch negativity, N2b, and P3b) and their related behavioral measures of discrimination (d-prime sensitivity and reaction time [RT]) in normal-hearing adults to increase our knowledge regarding how the brain responds to acoustical differences that occur within an articulatory speech feature and across articulatory features of speech. Design: Cortical ERPs were recorded to three sets of consonant-vowel speech stimuli (/bi versus /bu/, /ba/ versus /da/, /da/ versus /ta/) presented at 65 and 80 dB peak-to-peak equivalent SPL from 20 normal-hearing adults. All speech stimuli were presented in an oddball paradigm. Cortical ERPs were recorded from 10 individuals in the active-listening condition and another 10 individuals in the passive-listening condition. All listeners were tested at both stimulus intensities. Results: Mean amplitudes for all ERP components were considerably larger for the responses to the vowel contrast in comparison with the responses to the two consonant contrasts. Similarly, the mean mismatch negativity, P3b, and RT latencies were significantly shorter for the responses to the vowel versus consonant contrasts. For the majority of ERP components, only small nonsignificant differences occurred in either the ERP amplitude or the latency response measurements for stimuli within a particular articulatory feature of speech. Conclusions: The larger response amplitudes and earlier latencies for the cortical ERPs to the vowel versus consonant stimuli are likely related, in part, to the large spectral differences present in these speech contrasts. The measurements of response strength (amplitudes and d-prime scores) and response timing (ERP and RT latencies) for the various cortical ERPs suggest that the brain may have an easier task processing the steady state information present in the vowel stimuli in comparison with the rapidly changing formant transitions in the consonant stimuli. The purpose of this study was to investigate the effects of three articulatory speech features (vowel-space perception, place of articulation and voiced/voiceless distinctions) on various cortical ERPs in normal-hearing adults in order to increase our knowledge regarding how the brain processes acoustical differences that occur within as well as across articulatory speech features. Results revealed that the responses to the vowel stimuli were larger in amplitude and shorter in latency in comparison to the responses to the consonant stimuli. Only small, non-significant differences in ERP amplitudes and/or latencies occurred for responses to stimuli within a particular articulatory speech feature.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».