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Home » Archives for Harry Bratt
Harry Bratt

Harry Bratt

Senior Computer Scientist, Speech Technology and Research Laboratory
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Publications

Speech & natural language publications June 1, 2019

Mapping Individual to Group Level Collaboration Indicators Using Speech Data

Jennifer Smith, Nonye M. Alozie, Andreas Tsiartas, Colleen Richey, Harry Bratt

To address the challenge of mapping characteristics of individuals’ speech to information about the group, we coded behavioral and learning-related indicators of collaboration at the individual level.

Speech & natural language publications March 1, 2017

Toward human-assisted lexical unit discovery without text resources

Andreas Kathol, Dimitra Vergyri, Harry Bratt

This work addresses lexical unit discovery for languages without (usable) written resources.

Education & learning publications September 1, 2016

The SRI speech-based collaborative learning corpus

Colleen Richey, Nonye M. Alozie, Harry Bratt

We introduce the SRI speech-based collaborative learning corpus, a novel collection designed for the investigation and measurement of how students collaborate together in small groups.

Education & learning publications September 1, 2016

Privacy- preserving speech analytics for automatic assessment of student collaboration

Nonye M. Alozie, Jennifer Smith, Harry Bratt, Colleen Richey, Andreas Tsiartas

This work investigates whether nonlexical information from speech can automatically predict the quality of small-group collaborations. Audio was collected from students as they collaborated in groups of three to solve math problems.

Education & learning publications June 1, 2016

Spoken Interaction Modeling for Automatic Assessment of Collaborative Learning

Jennifer Smith, Harry Bratt, Colleen Richey, Andreas Tsiartas, Nonye M. Alozie

This study investigates whether automatic audio- based monitoring of interactions can predict collaboration quality.

Biomedical sciences publications May 1, 2015

Classification of Lexical Stress Using Spectral and Prosodic Features for Computer-assisted Language Learning Systems

Harry Bratt, Colleen Richey, Horacio Franco, Victor Abrash, Kristin Precoda

We present a system for detection of lexical stress in English words spoken by English learners. This system was designed to be part of the EduSpeak® computer-assisted language learning (CALL) software.

Speech & natural language publications May 1, 2014

Lexical Stress Classification for Language Learning Using Spectral and Segmental Features

Victor Abrash, Kristin Precoda, Horacio Franco, Harry Bratt, Colleen Richey

We present a system for detecting lexical stress in English words spoken by English learners.  The system uses both spectral and segmental features to detect three levels of stress for each syllable in a word. 

Speech & natural language publications May 1, 2014

Adaptive and Discriminative Modeling for Improved Mispronunciation Detection

Harry Bratt, Horacio Franco

In the context of computer-aided language learning, automatic detection of specific phone mispronunciations by nonnative speakers can be used to provide detailed feedback about specific pronunciation problems.

Speech & natural language publications December 1, 2011

Promoting robustness for speaker modeling in the community: the PRISM evaluation set

Harry Bratt, Martin Graciarena, Aaron Lawson

We introduce a new database for evaluation of speaker recognition systems. 

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