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a Box plots (10th and 90th percentile) of the number of trials to reach criterion for the four discrimination tasks and overall. A lower score suggests quicker learning. b Box plots (10th and 90th percentile) of the number of errors out of total trials for the four discriminations and overall. A lower score indicates greater accuracy. CD color discrimination, FD form discrimination, SD size discrimination, PosD position discrimination, all all tasks taken together
