César González-Ferreras

Deep Learning-Based Multi-Aspect Pronunciation Assessment for Individuals with Down Syndrome

David Fernández-García, César González-Ferreras, Valentín Cardeñoso-Payo, Mario Corrales-Astorgano

Matrix-Structured Hierarchical Convolutional Modeling for Pronunciation Assessment and Mispronunciation Detection

David Fernández-García, César González-Ferreras, Valentín Cardeñoso-Payo, Mario Corrales-Astorgano

We introduce M3C1, a hierarchical, matrix-structured convolutional framework for automatic pronunciation assessment (APA) and phone-level mispronunciation detection (MDD). Heterogeneous representations–GoP (LPP/LPR), canonical-phone embeddings, self-supervised learned representations (HuBERT, Wav2Vec 2.0, WavLM), and prosodic features–are reorganized into column-aligned matrices and compressed by a self-designed …

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Enhancing skill development in the medical kitchen: an in-depth exploration through the experiences of undergraduate medical students

Suwimol Prusmetikul, Jakub L. Radzikowski, César González-Ferreras, Aynkaran Dharmarajah et autres

BACKGROUND: The Medical Kitchen course was developed to facilitate the transition of second-year medical students from theoretical learning to clinical placements by integrating practical skill training within a transdisciplinary approach. This study explored two research questions: how students perceived their technical and …

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The Effects of Spontaneous Speech on Disfluencies Assessment of Spanish Speakers with Down Syndrome

David Fernández-García, César González-Ferreras, Valentín Cardeñoso-Payo, David Escudero-Mancebo et autres

The aim of this study is to investigate the phonetic and fluency characteristics of spontaneous speech produced by Spanish speakers with Down syndrome (DS) compared to nonspontaneous speech modes (read, elicited and imitation) and assess the impact of these differences both on …

Pronunciation Assessment and Automated Analysis of Speech in Individuals with Down Syndrome: Phonetic and Fluency Dimensions

Mario Corrales-Astorgano, César González-Ferreras, David Escudero-Mancebo, Lourdes Aguilar et autres

In this study, we analyze the potential use of an annotated corpus to identify various dimensions of speech quality, including phonetics and fluency, in individuals with Down syndrome, enabling the development of automated assessment systems. Two experiments were conducted: for phonetic evaluation, …

Cooperative Resilience in Artificial Intelligence Multiagent Systems

Manuela Chacon-Chamorro, Luis Felipe Giraldo, Nicanor Quijano, Vicente Vargas-Panesso et autres

Resilience refers to the ability of systems to withstand, adapt to, and recover from disruptive events. While studies on resilience have attracted significant attention across various research domains, the precise definition of this concept within the field of cooperative artificial intelligence remains …

A Comprehensive Rubric for Annotating Pathological Speech

Mario Corrales-Astorgano, David Escudero-Mancebo, Lourdes Aguilar, Valle Flores-Lucas et autres

Rubrics are a commonly used tool for labeling voice corpora in speech quality assessment, although their application in the context of pathological speech remains relatively limited. In this study, we introduce a comprehensive rubric based on various dimensions of speech quality, including …

Prosodic Feature Analysis for Automatic Speech Assessment and Individual Report Generation in People with Down Syndrome

Mario Corrales-Astorgano, César González-Ferreras, David Escudero-Mancebo, Valentín Cardeñoso-Payo

Evaluating prosodic quality poses unique challenges due to the intricate nature of prosody, which encompasses multiple form–function profiles. These challenges are more pronounced when analyzing the voices of individuals with Down syndrome (DS) due to increased variability. This paper introduces a procedure …

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Analysis of atypical prosodic patterns in the speech of people with Down syndrome

Mario Corrales-Astorgano, David Escudero-Mancebo, César González-Ferreras, Valentín Cardeñoso-Payo et autres

The speech of people with Down syndrome (DS) shows prosodic features which are distinct from those observed in the oral productions of typically developing (TD) speakers. Although a different prosodic realization does not necessarily imply wrong expression of prosodic functions, atypical expression …

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PRAUTOCAL corpus: a corpus for the study of Down syndrome prosodic aspects

David Escudero-Mancebo, Mario Corrales-Astorgano, Valentín Cardeñoso-Payo, Lourdes Aguilar et autres

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Prosodic feature selection for automatic quality assessment of oral productions in people with Down syndrome

David Escudero-Mancebo, Valentín Cardeñoso-Payo, Mario Corrales-Astorgano, César González-Ferreras

Incorporation of an automatic module for the prediction of the quality of oral communication of people with Down syndrome in an educational video game

Valentín Cardeñoso-Payo, Mario Corrales-Astorgano, César González-Ferreras, Valle Flores Lucas et autres