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Percent of correct trials per session during baseline (BL), training (●), and retention across tasks (▲) for Participant 2. Unfilled symbols (○,△) indicate that the mastery criterion of 8 consecutive correct responses was met. Participant 2 met the mastery criteria after 55, 64, and 56 training trials for Task 1, 2, and 3, respectively. During the retention tests, he met the criterion for Tasks 1 and 2, but not for Task 3.
