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The role of background similarity in aftereffect transfer from first-order real faces to first-order static cartoon faces. The adapting stimulus was always the saddest read face. The test stimuli were cartoon face sets with 1/fk noise backgrounds. a, The aftereffect, measured as the PSE shift from the corresponding baseline, as a function of k for four subjects. b, The slope (at PSE) of psychometric curves for the baseline conditions as a function of k.
