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Mean proportion of accurate responses (and standard errors of the means) in the Mapping and Generalization tasks in Experiment 1. Learners had to pick 1 object from 4 alternatives in the Mapping task. Therefore, the chance level was 1/4. Learners heard 1 novel word and had to choose its referent from 3 novel objects in the Generalization task. Therefore, the chance level was 1/3.
