Christopher MacLellan

schoolGeorgia Institute of Technologybar_chart#4751 Global Rank

Total Papers

HCI Rank

#4751

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Years Active

Recent Publications

Latest papers from Christopher MacLellan

CHI '26CorrespondingAI-Assisted Decision-Making & Automation +2

When Should Users Check? Modeling Confirmation Frequency in Multi-Step Agentic AI Tasks

Existing AI agents typically execute multi-step tasks autonomously and only allow user confirmation at the end. During execution, users have little control, making the confirm-at-end approach brittle: a single error can cascade and force a complete restart. Confirming every step avoids such failures, but imposes tedio…

DIS '25CorrespondingConversational Chatbots +2

Improving Public Service Chatbot Design and Civic Impact: Investigation of Citizens’ Perceptions of a Metro City 311 Chatbot

As governments increasingly adopt digital tools, public service chatbots have emerged as a growing communication channel. This paper explores the design considerations and engagement opportunities of public service chatbots, using a 311 chatbot from a metropolitan city as a case study. Our qualitative study consisted…

CHI '24CorrespondingHuman-LLM Collaboration +1

VAL: Interactive Task Learning with GPT Dialog Parsing

Machine learning often requires millions of examples to produce static, black-box models. In contrast, interactive task learning (ITL) emphasizes incremental knowledge acquisition from limited instruction provided by humans in modalities such as natural language. However, ITL systems often suffer from brittle, error-p…

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