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How should a companion system be designed that assists novice users in the Do-It-Yourself (DIY) domain? We investigate this question with a series of extensive empirical experiments and development iterations of a companion system prototype. We investigate the benefit of using hierarchical task planning, an ontology-based domain model, and agent-based dialog management for familiarizing novices with their DIY devices (electric drill driver, electric jigsaw) and proactively assisting them with successful execution of a DIY project. We outline the progression of our empirical methodology from qualitative toward quantitative investigation of various versions of our assistant with increasing sets of capabilities based on previous evaluations.
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Schiller et al. (2026) studied this question.
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