Lee, Tae-HoItti, LaurenMather, Mara2018-11-192018-11-192012-07-19http://hdl.handle.net/10919/85888Arousal-biased competition theory predicts that arousal biases competition in favor of perceptually salient stimuli and against non-salient stimuli (Mather and Sutherland, 2011). The current study tested this hypothesis by having observers complete many trials in a visual search task in which the target either always was salient (a 55° tilted line among 80° distractors) or non-salient (a 55° tilted line among 50° distractors). Each participant completed one session in an emotional condition, in which visual search trials were preceded by negative arousing images, and one session in a non-emotional condition, in which the arousing images were replaced with neutral images (with session order counterbalanced). Test trials in which the target line had to be selected from among a set of lines with different tilts revealed that the emotional condition enhanced identification of the salient target line tilt but impaired identification of the non-salient target line tilt.Thus, arousal enhanced perceptual learning of salient stimuli but impaired perceptual learning of non-salient stimuli.en-USCreative Commons Attribution 4.0 Internationalbottom-up salienceemotional arousaloptimal gain biaspop-out searchthreatvisual searchArticle - Refereedhttps://doi.org/10.3389/fpsyg.2012.002413