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Attention operating characteristic for Experiment 2. Observed accuracy, measured as area under ROC curve, in single (blue) and dual (red) tasks in the unilateral-like condition (A, reproduced from Popovkina et al., 2021) and bilateral condition (B, current study). Error bars are the standard error of the mean. Solid line: prediction of the independent parallel model. Dashed line: prediction of the all-or-none serial model. Dotted curve: prediction of the fixed-capacity parallel model.
