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Accuracy scores (d′) and standard errors on four behavioral tests: (1) before speech stream exposure, (2) after 16 minutes of exposure, (3) after mastering the words during training, and (4) after 16 additional minutes of exposure. Zero indicates chance performance, and the dotted line indicates the training criterion (d′ = 1.8). Performance on tests 3 and 4 was significantly above chance (* indicates p < .001).
