Lyle Ungar

schoolUniversity of Pennsylvaniabar_chart#4767 Global Rank

Total Papers

HCI Rank

#4767

Research Areas

Years Active

Recent Publications

Voice-Based Chatbots for English Speaking Practice in Multilingual Low-Resource Indian Schools: A Multi-Stakeholder Study

Spoken English proficiency is a powerful driver of economic mobility for low-income Indian youth, yet opportunities for spoken practice remain scarce in schools. We investigate the deployment of a voice-based chatbot for English conversation practice across four low-resource schools in Delhi. Through a six-day field s…

CHI '25CorrespondingHuman-LLM Collaboration +1

Efficient Management of LLM-Based Coaching Agents' Reasoning While Maintaining Interaction Quality and Speed

LLM-based agents improve upon standalone LLMs, which are optimized for immediate intent-satisfaction, by allowing the pursuit of more extended objectives, such as helping users over the long term. To do so, LLM-based agents need to reason before responding. For complex tasks like personalized coaching, this reasoning…

CSCW '204th AuthorStorytelling / Research Method Reflections

Studying Politeness across Cultures Using English Twitter and Mandarin Weibo

Modeling politeness across cultures helps to improve intercultural communication by uncovering what is considered appropriate and polite. We study the linguistic features associated with politeness across US English and Mandarin Chinese. First, we annotate 5,300 Twitter posts from the US and 5,300 Sina Weibo posts fro…

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