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Robot tutors have great potential for supporting personalized learning, in both home and classroom settings. To be effective, robot tutors must encourage users to seek help as needed during the learning process. We conducted a between-subjects study with N = 45 participants to compare different types of learner help-seeking behaviors-pressing an on-screen button, pressing a physical button, and raising a hand-and assess how help-seeking behavior preferences relate to perceptions of the robotdoi:10.1109/ro-man46459.2019.8956370 dblp:conf/ro-man/JordanPM19 fatcat:ctzflztocrhbdjy5fmeqlgbfem