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Slopes of the reaction times as a function of search array set size for each target identity and each participant group in Experiment 3. The efficiency of search for the Mooney face targets increased with more experience (A = Group 1, B = Group 2, C = Group 3). Black bar, upright; gray bar, inverted; filled bar, target-present; hollow bar, target-absent. Error bars represent ± 1 SEM.
