Senior Computer Scientist, Speech Technology and Research Laboratory
Harry Bratt is a senior computer scientist in SRI International’s Speech Technology and Research Laboratory. With a background in computer science and linguistics—focusing on phonetics and phonology—his research interests extend across human-machine interaction, spoken language systems, and computer-assisted language learning.
He has been a major contributor to the EduSpeak® Speech Recognition Toolkit and has built several GUI-based tools to help speech researchers process, analyze, and visualize data.
Bratt holds an A.B. in linguistics from the University of Michigan.
Recent publicationsmore +
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.
This work addresses lexical unit discovery for languages without (usable) written resources.
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…
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.
This study investigates whether automatic audio- based monitoring of interactions can predict collaboration quality.
Classification of Lexical Stress Using Spectral and Prosodic Features for Computer-assisted Language Learning Systems
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)…